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The subgenus Portmannia Young (1980) of the Neotropical genus Desmopachriais characterized by its ovate, sometimes almost globose body form, smooth shining integument between relatively fine punctures, and sexually dimorphic prostemal process. In the females the prosternal process comes to a point as in other members of Desmopachria, but in males the process is bifid or forked. The species are found from Texas and Arizona to Brazil in South America. They are particularly abundant in Mexico. A key is given for twelve species which are described and figured. The following species are described as new: decorosus (Mexico), goias (Brazil), pittieri (Costa Rica), sobrina (Mexico) and zethus (Mexico). The color is variable. Some species are relatively darkly colored without distinct darker markings, and usually with some coarser punctation on part of the dorsum. These seem to be characteristic of the tropical forests (D. laevis Sharp and D. specula Sharp. D. goias is also dark with vague spots on the elytra). Most of the Mexican and Central American species are characterized by at least parts of the elytra being lighter in color than the head and pronotum, sometimes strikingly contrasting. The latter group may or may not have a distinct dark color patterns of the elytra or on head and pronotum. In both groups some species are intensely dark brown or black beneath, but this character maybe influenced by degree of hardening of the cuticle. Nearly all the species have darker markings along the suture of the elytra and base of the pronotum. Some species are distinctly patterned on the elytra which probably represents disruptive coloration helping to conceal them in the clear, sand-bottomed habitats in which most occur.
Homology of virtually all major components of facial anatomy is assessed in Archosauria in order to address the function of the antorbital cavity, an enigmatic structure that is diagnostic for the group. Proposed functions center on its being a housing for a gland, a muscle, or a paranasal air sinus. Homology is approached in the context of the Extant Phylogenetic Bracket method of reconstructing unpreserved aspects of extinct organisms. Facial anatomy and its ontogeny was studied in extant archosaurs (birds and crocodilians) to determine the osteological correlates of each soft-tissue component; resemblances between birds and crocodilians comprised the similarity test of homology. The congruence test of homology involved surveying phyiogenetically relevant fossil archosaurs for these bony signatures. The facial anatomy of extant birds and crocodilians is examined in detail to provide background and to discover those apomorphic aspects that contribute to the divergent specialization of these two groups and thus obscure homologies. Birds apomorphically show enlarged eyeballs, expanded nasal vestibules, and reduced maxillae, whereas crocodilian faces are dorsoventrally flattened (due to nasal rotation) and elongated. Most facial attributes of archosaurs are demonstrably homologous and in fact characterize much more inclusive groups. Special emphasis has been placed on the nasal conchae and paranasal air sinuses. Within Amniota, the following conchal structures are homologous, and all others are neomorphs: avian caudal concha, crocodilian concha + preconcha, Sphenodon caudal concha, squamate concha, and probably the mammalian crista semicircularis. The avian antorhital paranasal air sinus is homologous with the crocodilian caviconchal sinus; the maxillary sinus of placental mammals is not homologous with the archosaurian paranasal sinus. With regard to the function of the antorbital cavity, archosaurs possess homologous nasal glands, dorsal pterygoideus muscles, and paranasal air sinuses, but the osteological correlates of only the paranasal sinus involve the antorbital fenestrae and fossae. Thus, the antorbital cavity is best interpreted as principally a pneumatic structure.
Occurrence of the milliped Ergodesmus compactus Chamberlin in Canada (Polydesmida: Nearctodesmidae)
(1995)
Recent collecting in southcentral British Columbia, near the International Border, has confirmed the Canadian occurrence of the milliped Ergodesmus compactus Chamberlin, which was predicted by field work in the adjacent part of the United States. With Nearctodesmus insulanus (Chamberlin) occupying the Shuswap Highlands and the Pacific Coastal region, the Nearctodesmidae is known from three separate regions of Canada, all in British Columbia. Other millipeds in the northwestern United States that may be reasonably anticipated in western Canada are discussed.
Diagnostic characters of Glaresis mendica Horn are discussed, and an undescribed species, confused with G. mendica by authors subsequent to Horn, is described as Glaresis gordoni new species. A second new species, Glaresis zvirgzdinsi, is described from two isolated sand dunes in Yuma County, Arizona, USA. Diagnostic characters of the new species, as well as those of G. mendica, are illustrated.
Arachnology and the Internet
(1995)
Book Review: Identification Guide to the Ant Genera of the World by Barry Bolton Bolton's aim in producing this book was to provide a means of identifying all extant ant genera, and to produce a catalog of existing and fossil genera, as well as the tribes and subfamilies of Formicidae. In accomplishing this goal, he has been thorough, meticulous, and lucid in his revision.
Taxonomic results of the Bryotrop expedition to Zaire and Rwanda : 29., Thuidiaceae, Thuidium
(1995)
For a revision of the African species see Touw (1976). The scarcity of Thuidium samples among the expedition’s collections is most surprising and inexplicable, considering the size of the expedition, the range of habitats and altitudes explored, and the many Thuidium collections made by others in this part of Africa.
Distichophyllum meizhii Tan & Lin and D. wanianum Tan & Lin (Hookeriaceae) collected from southwestern region of China are described as new to science. Also, Horikawaea redfearnii Tan & Lin is described as a new species based on collections from Hainan Island of China and Palawan Island of the Philippines. The sporophytic specimen of Horikawaea Nog. was collected for the first time and support a family placement in Pterobryaceae.
Hatching asynchrony and the onset of incubation in birds revisited : when is the critical period?
(1995)
1. Birds are unique among animals in being able to influence the birthing intervals of their young through the timing of the onset incubation. However, many species hatch their young asynchronously, frequently resulting in reduced survivorship for later-hatched young. This is the Paradox of Hatching Asynchrony. 2. The Brood Reduction Hypothesis provided a resolution to the paradox by suggesting an adaptive function to the offspring mortality that results from asynchrony. Experimental tests have provided little support, and 16 alternative hypotheses have been proposed, but few have been tested. Most experimental tests have not measured important parameters such as parental effort and postfledging survival. Many have lacked adequate controls or sufficient statistical power. 3. We divide the hypotheses for hatching asynchrony into four categories based on the effects of intrinsic or extrinsic factors during a critical period of the nesting cycle which constrains reproductive success. Hatching asynchrony could be simply the consequence of the early onset of incubation during egg-laying, either as a result of physiological constraints on incubation or because parents derive fitness benefits from the protective function of early incubation. During the nestling period, hatching asynchrony could be adaptive if it allowed parents to eliminate one or more nestlings selectively, or increased parental efficiency. Alternatively, parents could manipulate the duration of the different periods of the nesting cycle to maximize benefits. 4. Because the onset of incubation generally determines hatching patterns, we encourage refocusing attention from the search for adaptive hatching patterns during the nestling period to the events surrounding the onset of incubation during egg-laying. Many factors can affect when incubation is begun, including physiology, and interactions with the environment, predators, competitors, and mates. 5. Patterns of the onset of incubation are difficult to determine and to quantify, in part because many birds begin incubating gradually, or at night. In some species, the onset of incubation varies with clutch size, but not in others. 6. The onset of incubation is the principle proximate control of hatching patterns, but other factors, such as egg size, embryonic vocalizations, and time of year may also affect hatching patterns. 7. Synchronous hatching is the primitive condition in birds, and is widespread in the lower, primarily precocial taxa. Most altricial species hatch their eggs asynchronously, although some exhibit synchrony as a secondarily derived trait. Hatching patterns show wide variation within some orders and families. 8. Patterns of the onset of incubation and hatching in a species may reflect the influence of multiplefactors. The relative importance of those factors may depend on the trade-offs associated with the potential benefits of early incubation to the survival of eggs and the potential costs to the survivor of later-hatching young associatedwith nestling size hierarchies. 9. The relative effects of multiple factors can be examined by integrating the results of empirical tests of single factors through modeling. 10. We demonstrated the use of a stochastic model by using empirical data from the House Sparrow. Results revealed the trade-offs inherent in the onset of incubation from differences in egg viability and nestling survivorship. An intermediate onset of incubation produced the greatest fledging success. 11. Other factors may be integrated into such models if they can be measured in terms of their effects on fledging success. Different factors, represented by different hypotheses, vary in how readily they may be modeled.
Two new species of the genus Euxesta Loew are described and illustrated: E. pacifica from California and E. atlantica from Florida, in the Quaternaria subgroup of the Notata group. A key is presented to the two new species, as well as E. calligyna (Bigot 1857), E. quaternaria Loew (1868), E. luteocesta Foote (1960), and E. nigricans Wulp (1903) of the quaternaria subgroup.
The acquisition of Greek
(1995)
Studie zum Erwerb des Neugriechischen
Additional descriptive information is given for the genus Ananthidium Urban with a key to species. Also, new geographical and floral records are given. A key to the genera of the Anthidiini of Argentina is provided. Bothranthidium Moure is considered a subgenus of Anthodioctes. A brief discussion of generic characters of the South American genera are given. Carlotica Moure & Urban is placed as a synonym of Epanthidium Moure. Also, Saranthidium Moore & Hurd is considered as a subgenus of Hypanthidiodes Moore.
Examination of a large collection of Ceratopogonidae from Rondonia, Brazil, resulted in records of 11 species in the tribes Heteromyiini and Sphaeromiini, including the NEW GENUS Groganhelea Spinelli & Dippolito NEWGENUS, which is described herein, with its type-species G. rondoniensis Spinelli & Dippolito, NEW SPECIES. Heteromyia correntina Lane & Duret and Mallochohelea termophila (Spinelli) are recorded for the first time from Brazil.
We calculate the evolution of quark-gluon-plasma droplets during the hadronization in a thermodynamical model. It is speculated that cooling as well as strangeness enrichment allow for the formation of strangelets even at very high initial entropy per baryon S/Ainit H 500 and low initial baryon numbers of Ainit B H 30. It is shown that the droplet with vanishing initial chemical potential of strange quarks and a very moderate chemical potential of up/down quarks immediately charges up with strangeness. Baryon densi- ties of H 2 0 and strange chemical potentials of µs > 350 MeV are reached if strangelets are stable. The importance of net baryon and net strangeness fluctuations for the possible strangelet formation at RHIC and LHC is em- phasized. Pacs-Classif.: 25.15.tr, 12.38.Mh, 24.85.tp
In the framework of RQMD we investigate antiproton observables in massive heavy ion collisions at AGS energies and compare to preliminary results of the E878 collaboration. We focus here on the considerable influence of the real part of an antinucleon nucleus optical potential on the ¯p momentum spectra. Pacs-numbers: 14.20 Dh, 25.70.-z
It is demonstrated that there is no valid basis on which to sustain the monotypic genus Bathycranium Strobl and concluded that Bathycranium should be recognised as a junior synonym of Syntormon Loew (new status). The species Syntormon bicolorellus Zetterstedt (new combination) falls into a natural grouping of Syntormon species with downcurved facial hairs in females. This species and S. luteicornis Parent are redescribed. Distinctions between Syntormonand Parasyntormon are discussed.
A new genus and species of stygobiontic bidessine dytiscid beetle, Comaldessus stygius, from Comal Springs, Texas, is described and compared with the proposed sister epigean genus Uuarus and the only other known stygobiontic bidessine water beetles, Trogloguignotus concii Sanfilippo from Venezuela and Uvarus chappuisi (Peschet) from Africa. Distinctive characters of the adult are illustrated with pen and ink drawings and scanning electron micrographs. The new taxon is the second stygobiontic bidessine genus with rudimentary eyes known from the Western Hemisphere and the first known from North America.
The disappearance of flow
(1995)
We investigate the disappearance of collective flow in the reaction plane in heavy-ion collisions within a microscopic model (QMD). A systematic study of the impact parameter dependence is performed for the system Ca+Ca. The balance energy strongly increases with impact parameter. Momentum dependent interactions reduce the balance energies for intermediate impact parameters b ~ 4.5 fm. Dynamical negative flow is not visible in the laboratory frame but does exist in the contact frame for the heavy system Au+Au. For semi-peripheral collisions of Ca+Ca with b ~ 6.5 fm a new two-component flow is discussed. Azimuthal distributions exhibit strong collectiv flow signals, even at the balance energy.
Mosses new to Hong Kong (1)
(1995)
Ten moss species - Garkea flexuosa (Griffith) Marg. & Nork., Campylopus laxitextus Lac., Fissidens dubius P. Beauv., Fissidens ceylonensis Dozy & Molk, Fissidens maceratus Mitt., Philonotis thwaitesii Mitt., Isopterygium minutirameum (C. Muell.)Jaeg., Homalia trichomanoides (Hedw.) B.S.G., Pogonatum neesii (C. Muell.) Dozyand Polytrichum formosum Hedw. are reported new to Hong Kong. Among them, five are new to Guangdong Province of China.
Mosses new to Hong Kong (3)
(1995)
Ten moss species - Philonotis turneriana (Schwaegr.) Mitt., Fissidens javanicus Dozy & Molk., Lopidium nazeense (Ther.) Broth., Himatocladium cyclophyllum (C. Muell.) Fleisch., Homaliodendron exigiuum (Bosch & Lac.) Fleisch., Homaliodendron microdendron (Mont.) Fleisch., Homaliodendron scapellifolium (Mitt.) Fleisch., Pinnatella anacamptolepis (C.Muell.) Broth., Calyptothecium wrightii (Mitt.) Fleisch. and Haplocladium angustifolium (Hampe & C. Muell.) Broth. are reported new to Hong Kong. Among them, four are new to Guangdong Province of China. An updated checklist of Hong Kong mosses is provided.
Mosses new to Hong Kong (2)
(1995)
Ten moss species - Thamnobryum plicatulum (Lac.) Iwats., Ditrichum pallidum (Hedw.) Hampe, Brachythecium moriense Besch., Eurhynchium hians (Hedw.) Lac., Atrichum undulatum (Hedw.) P. Beauv., Bryum coronatum Schwaegr., Pseudoleskeopsis zippelii (Dozy & Molk.) Broth., Weissia controversa Hedw., Trichosteleum mammosum (C. Muell.) Jaeg. and Vesicularia reticulata (Dozy & Molk.) Broth. are reported new to Hong Kong. Among them, seven are new to Guangdong Province of China.
Mosses new to Hong Kong (4)
(1995)
Sixteen moss species - Eurhynchium asperisetum (C. Muell.) Tak.; Rhynchostegium pallidifolium (Mitt.) Jaeg.; Bryum argenteum Hedw.; Bryum caespiticium Hedw.; Bryum capillare Hedw.; Platyhynidium riarioides (Hedw.) Dix.; Dicranella varia (Hedw.) Schimp.;Entodon virudulus Card.; Fissidens strictulus C. Muell.; Ectropothecium obtusulum (Card.) Iwats.; Caduciella guangdongensis Enroth.; Plagiomnium cuspidatum (Hedw.) T. Kop.; Plagiomnium vesicatum (Besch.) T. Kop.; Pyrrhobryum spiniforme (Hedw.) Mitt., Taxithelium nepalense (Schwaegr.) Broth. and Claopodium aciculum (Broth.) Broth. are reported new to Hong Kong. Among them, four are new to Guangdong Province of China.
Aphodius alabama, new species, collected in burrows of the southeastern pocket gopher Geomys pinetus Rafinesque, is described. Aphodius dyspistus Skelley & Woodruff, A. hubbelli S. & W., A. platypleurus S. & W., and A. tanytarsus S. & W., collected with A. alubarna, are all recorded from southeastern Alabama.
To date, only two references place members of the genus Diplocentrus in Sonora, Mexico. The first was a passing comment by Francke (1975) that D. spitzeri Stahnke occurs in northeastern Sonora. The specimens he examined and used in his systematic studies on that species are the same as the ones reported here for the first time from a specific Sonoran locality. The second reference was by Sissom and Walker (1992) listing a single record of D. gertschi Sissom and Walker from Libertad on the northern coast. Examination of material from the American Museum of Natural History (AMNH), the California Academy of Sciences (CAS), and the Academy of Natural Sciences (ANS) indicates that, in addition to D. spitzeri and D. gertschi, another distinct species occurs in the Alamos and Navajoa areas in southern Sonora. This species is described as new below. It should be noted that a juvenile specimen from the vicinity of Benjamin Hill was also examined that was unassignable with certainty to any of the above species. This indicates that the genus has a wider distribution in Sonora than demonstrated even by the specimens listed in this report. Nomenclature and mensuration utilized herein essentially follows that of Stahnke (1970), with the following exceptions: carinal terminology and cheliceral measurements are after Francke (1975,1977) and trichobothrial terminology is after Vachon (1974). Specimens in the senior author's collection are listed in the records sections as "WDS”. Because D. spitzeri and the new species are both quite similar to D. peloncil1ensis Francke, the latter is included in the tables for comparison; in addition, the hemispermatophore of this species is also drawn. D. peloncillensis was described from only 6 males, 1 female, and 1 juvenile. The data presented here for D. peloncillensis are derived from these and new specimens available since the original description was published (Francke 1975), thereby providing a better understanding of variation in this species.
The self-teaching hypothesis proposes that phonological recoding functions as a self-teaching mechanism enabling the learner to independently acquire an autonomous orthographic lexicon. Successful decoding encounters with novel letter strings provide opportunities to learn word-specific print-to-meaning connections. Although it may not playa central role in skilled word recognition, phonological recoding, by virtue of its self-teaching function, is regarded as critical to successful reading acquisition. This paper elaborates the self-teaching hypothesis proposed by Jorm and Share (1983), and reviews relevant evidence. Key features of phonological recoding include an item-based rather than stage-based role in development, the progressive "lexicalization" of the process of recoding, and the importance of phonological awareness and contextual information in resolving decoding ambiguity. Although phonological skills have been shown to be primary in reading acquisition, orthographic processing appears to be an important but secondary source of individual differences. This implies an asymmetrical pattern of dissociations in both developmental and acquired reading disorders. Strong relationships between word recognition, basic phonological processing abilities and phonemic awareness are also consistent with the self-teaching notion. Finally, it is noted that current models of word recognition (both PDP and dual-route) fail to address the quintessential problem of reading acquisition - independent generation of target pronunciations for novel orthographic strings.
We introduce algorithms for lattice basis reduction that are improvements of the famous L3-algorithm. If a random L3-reduced lattice basis b1,b2,...,bn is given such that the vector of reduced Gram-Schmidt coefficients ({µi,j} 1<= j< i<= n) is uniformly distributed in [0,1)n(n-1)/2, then the pruned enumeration finds with positive probability a shortest lattice vector. We demonstrate the power of these algorithms by solving random subset sum problems of arbitrary density with 74 and 82 many weights, by breaking the Chor-Rivest cryptoscheme in dimensions 103 and 151 and by breaking Damgard's hash function.
The lemmings theory of case
(1995)
Early features
(1995)
[I]n its present form, the bibliography contains approximately 1100 entries. Bibliographical work is never complete, and the present one is still modest in a number of respects. It is not annotated, and it still contains a lot of mistakes and inconsistencies. It has nevertheless reached a stage which justifies considering the possibility of making it available to the public. The first step towards this is its pre-publication in the form of this working paper. […]
The bibliography is less complete for earlier years. For works before 1970, the bibliographies of Firbas and Golkova 1975 and Tyl 1970 may be consulted, which have not been included here.
In this paper I show that Clitic Climbing (CC) in Spanish and Long Scrambling (LS) in German (and Polish) are (im-)possible out of the same environments. For an explanation of this fact I propose a feature-oriented analysis of incorporation phenomena. The idea is that restructuring is a phenomenon of syntactic incorporation. In German and Polish, Agro incorporates covertly into the matrix clause and licenses LS out of the infinitival into the matrix clause. Similarily the clitic in Spanish, which is analysed as an Agro-head, incorporates into the matrix clause. I argue that this movement is necessary for reasons of feature-checking, i. e. for checking of an [+R]- or Restructuring-feature. In section 2 I discuss several differences between CC and LS. For example, the proposed analysis correctly predicts that clitics in contrast to scrambled phrases are subject to several serialization restrictions. Throughout the paper I use the term restructuring only in a descriptive sense, in order to describe the phenomenon in question.
We call a vector x/spl isin/R/sup n/ highly regular if it satisfies =0 for some short, non-zero integer vector m where <...> is the inner product. We present an algorithm which given x/spl isin/R/sup n/ and /spl alpha//spl isin/N finds a highly regular nearby point x' and a short integer relation m for x'. The nearby point x' is 'good' in the sense that no short relation m~ of length less than /spl alpha//2 exists for points x~ within half the x'-distance from x. The integer relation m for x' is for random x up to an average factor 2/sup /spl alpha//2/ a shortest integer relation for x'. Our algorithm uses, for arbitrary real input x, at most O(n/sup 4/(n+log A)) many arithmetical operations on real numbers. If a is rational the algorithm operates on integers having at most O(n/sup 5/+n/sup 3/(log /spl alpha/)/sup 2/+log(/spl par/qx/spl par//sup 2/)) many bits where q is the common denominator for x.
Chromosome numbers with information on meiotic behaviour are recorded for the first time for the following taxa in the family Orthotrichaceae from Papua New Guinea - Desmotheca apiculata (Dozy & Molk.) Lindb. ex Card. n=6; Macromitrium incurvifolium (Hook. & Grev.) Schwaegr. n=9, M. longicaule C. Muell. n=6 (5+X/y), M. orthostichum Nees ex Schwaegr. n=7 (6+ X/y), M. salakanum C. Muell. n=9, M. similirete Bartr. n=9. M. streimannii Vitt n=9 (8+m); Schlotheimia emarginato-pilosa Herz. n=9 and S. macgregorii Broth. & Geh. n=11.
What are the similarities and differences in the loss of grammatical systems across individual languages? To answer this question, I examine structural consequences of language attrition and the correspondences between language-particular and cross-linguistic phenomena under circumstances of severe attrition. However, the very formulation of this approach, involving "severe attrition", already warrants some clarification, It leads to the formuIation of two collateral questions. First, how can the level of language attrition be quantified? Second, which structural features are diagnostic of the decline of grammar? I present data on structural change in six attrited languages as compared to non-attrited control languages and demonstrate that there is significant parallelism in structural change across languages. Next, I show a correlation between levels of grammatical and lexical loss and introduce a simple test allowing us to measure the level of attrition.
We investigate the influence of nuclear masses, radii, and interaction potentials on 12C radioactivity of 114the best representative of a new island of cluster emitters leading to daughter nuclei around the doubly magic 100Sn. Three different models are considered: one derived by Blendowske, Fliessbach, and Walliser (BFW) from the many-body theory of alpha decay, as well as our analytical (ASAF) and numerical (NuSAF) superasymmetric fission models. A Q value larger by 1 MeV or an ASAF potential barrier reduced by 3% are producing a half-life shorter by 2 orders of magnitude. A similar effect can be obtained within BFW and NuSAF by a decrease of the action integral with less than 10% and 5%, respectively. By increasing the radius constant within ASAF or BFW models by 10%, the half-life becomes shorter by 3 orders of magnitude.
The case of German relatives
(1995)
2939 moss taxa are listed for sub-Saharan Africa and adjacent islands, with distribution by country. Each distribution record is supported by a literature reference. The following new combinations are made: Calyptrochaeta cristata (Hedw.) O’Shea, Groutiella elimbata (Thér) O’Shea, Meiothecium undulatum (Ren. & Card.) O’Shea, Orthodontium ruwenzorensis (Thér. & Nav.) O’Shea, Pohlia lacouturei (Thér.) O’Shea, Sematophyllum corticolum (Aongstr.) O’Shea, Sematophyllum dixonii (Thér.) O’Shea, Sematophyllum nanopyxis (Geh.) O’Shea, Sematophyllum rigescens (Card.) O’Shea, and Thamnobryum malgachum (Card.) O’Shea.
Extremely short verbs can be found in various Genn::.,nic languages and dialects; the sterns of these verbs do not have a fInal consonant «C-)C-V), and they always have a monosyllabic infinitive and usually monosyllabic fInite forms as weIl. Examples for these 'kinds of short verbs are Swiss Gennan hä 'to have', gö 'to go', g~ 'to give', n~ 'to take' which correspond to the Swedish verbs ha, gä, ge and tao The last example shows that such short verb formations also occur with verbs having (nearly) identical meanings but which do not share the same etymology. Apart from their shortness, these verbs are characterized by a high degree of irregularity, often even by suppletion, which sometimes develops contrary to regular sound laws. Furthermore they are among the most-used verbs and often tend towards grammaticalization. The present paper compares the short verbs of seven Germanic languages; in addition, it describes their various ways of development and strategies of differentiation. Moreover, it examines the question of why some languages and dialects (e.g. Swiss German, Frisian, Swedish, Norwegian) have many short verbs while others (New High German, Icelandic, Faroese) only have few, the paper discusses the contribution of short verbs to questions concerning linguistic change and the morphological organization of languages.
Ten new species of Tetraleurodes (bireflexa, caulicola, chiuela, confusa, dorsirugosa, mexicana, perseae, pseudacaciae, quercicola, tuberculosa) are described and four previously known species are redescribed. The acaciae group consisting of seven species is proposed, and a key to the acaciae group and 12 North American species is provided. In addition, herberti Penny is synonymized with acaciae (Quaintance), nudus Sampson and Drews is synonymized with fici Quaintance and Baker, and stanfordi (Bemis) is synonymized with perileuca (Cockerell). Aleurotrachelus cacaorum Bondar is reassigned to Tetraleurodes, and T. papilliferus Sampson and Drews is reassigned to Aleurotrachelus.
Seventeen species of Anaphothrips are here recorded and reviewed from the Nearctic Region. Six new species, A. helvolus, A. luteus, A. mexicanus, A. paludicola, A. trimaculatus, and A. univittatus, and 11 nominal species are described. A key to the females of 17 species and to males of 11 species is provided. Anaphothrips flavocastaneus Johansen is reassigned to Oxythrips, A. ripicola Hood is revived as a good species, A. sandersoni Stannard is treated as a junior synonym of A. decolor Hood, and A. sudanensis Trybom is reported from Mexico.