Insecta Mundi
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830
The Colaspis suilla species group (Coleoptera: Chrysomelidae: Eumolpinae) is defined relative to other species of the genus Colaspis Fabricius occurring in the United States. The group is composed of five species, of which three from Florida are described as new species: C. ansa Riley from the Florida Panhandle, C. skelleyi Riley from Central Florida, and C. thomasi Riley from the southern Lake Wales Ridge. Colaspis suilla borealis Blake is reduced to a full synonym of C. suilla Fabricius, new synonymy. Comparative remarks, habitus images, images of male and female genitalia, range maps, specimen data, and a key to species are presented.
834
Description of two new genera and a taxonomic key to the world genera of Cybocephalidae (Coleoptera)
(2020)
The sixteen genera of Cybocephalidae (Coleoptera) occurring worldwide are listed and keyed. The genera included are Amedissia Kirejtshuk and Mantič, Apastillus Kirejtshuk and Mantič, Cybocephalus Erichson, Endrodiellus Endrödy-Younga, Eupastillus Lawrence, Hierronius Endrödy-Younga, Horadion Endrödy-Younga, Pacicephalus Kirejtshuk and Mantič, Pastillocenicus Kirejtshuk and Nel, Pastillodes Endrödy-Younga, Pastillus Endrödy-Younga, Pycnocephalus Sharp, Taxicephomerus Kirejtshuk, Theticephalus Kirejtshuk, a description of a new genus, Microthomas T. R. Smith, with one new species, M. brevicornis T. R. Smith, from Bolivia, and a new genus, Conglobatus T. R. Smith, with two new species, C. armatus T. R. Smith from Central and South America and C. fullertoni T. R. Smith from Dominica. A key to genera, illustrations of morphological features, and distributional data are provided. The genus Nodola Bréthes is found to be a new synonym of Cybocephalus Erichson. The transfer of Nodola chilensis Bréthes into Cybocephalus creates a secondary homonymy with C. chilensis Reitter. Nodola chilensis Bréthes is here given a new name, Cybocephalus brethesi T. R. Smith.
836
840
Two new species of Carpophilus Stephens, 1829 in the subgenus Ecnomorphus Motschulsky, 1858 (Coleoptera: Nitidulidae) were recovered in material from the Caribbean. Descriptions and detailed diagnoses are provided for Carpophilus (Ecnomorphus) jamaicensis Powell and Schnepp, new species and Carpophilus (Ecnomorphus) thomasi Powell and Schnepp, new species. A key to the Carpophilus (Ecnomorphus) of the West Indies is appended.
820
Micromorphometric analyses of genital capsules and comparison of adult cuticular reflectance of two species of Chrysina Kirby (Coleoptera: Scarabaeidae: Rutelinae) support the status of C. valentini Zubov and Ivshin, 2019 as a valid species. Compared with its closest relative C. optima (Bates, 1888), capsules of C. valentini are proportionately wider at the base of the parameres than those of C. optima, and taper toward the apex more abruptly. Reflectance of C. valentini under natural light appears slightly greenish while C. optima is uniformly reddish. The number of teeth on the protibia and the shape of the mesosternal process, characters cited by Zubov et al. (2019) to distinguish the two species, did not prove reliable.
832
821
The catalogue of species-group names of nine coprine genera (Coleoptera: Scarabaeidae: Scarabaeinae: Coprini), published earlier this year, is updated and revised. Presented are species-group taxa overlooked in compiling the catalogue and new species-group taxa described in 2020, i.e. after the cut-off date of the catalogue.
823
843
Diolcus thomasi Eger new species (Hemiptera: Heteroptera: Scutelleridae: Pachycorinae), is described from Cayman Brac and Little Cayman Island and compared to D. chrysorrhoeus (Fabricius), its closest congener. Nesogenes boscii (Fabricius) is removed from the Elvisurinae and placed in the Pachycorinae. The relationship of N. boscii to D. thomasi and D. chrysorrhoeus is discussed.
815
A gall midge, Cystiphora sonchi (Vallot, 1827) (Diptera: Cecidomyiidae), is reported for the first time in the continental United States of America from the states of Minnesota, North Dakota, and South Dakota. The gall midge is an obligate parasite of Sonchus L., including perennial sowthistle, Sonchus arvensis L., a weed that was the impetus for earlier releases of C. sonchi as a biological control in Canada. Patches of S. arvensis were commonly infested with C. sonchi, and often leaves were densely galled. Dissections of galled leaves led to the novel finding of multiple C. sonchi larvae in some individual galls. In addition, three parasitoids emerged from galls sampled in South Dakota: Aprostocetus cf. atticus Graham, Ceraphron sp., and a possible new species of Lyrcus Walker. Further research is warranted to determine the geographic extent of C. sonchi and its parasitoids in the USA, and to determine the impact of C. sonchi on its weedy hosts.