Insecta Mundi, Volume 7 (1993)
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Critical taxonomic analysis of the Hydrellia pakistanae species group yielded H. pakistanae Deonier, H. sarahae, n.sp. (composed of H. sarahae sarahae, n.ssp. in China and H. sarahae laticapsula, n.ssp. in India and Pakistan), H. balciunasi Bock known only from Australia, and a related species, H. bogorae, n.sp. from Java, Indonesia. These species all have the same primary host-plant species, i.e., Hydrilla verticillata, a fact making them all potential biocontrol agents for this aquatic plant pest in North America and other areas where it has pest status. Morphology is summarized as well as perceived synapomorphies of this species group.
The tribe Rhopalophorini is reviewed for North and Central America. Keys to genera and species are provided, and known species are redescribed. The genus Rhopalophora Audinet-Serville is revised to include 16 species, with the following additions: R.serripennis n. sp. and R. yucatana n. sp. are described from Mexico; R. rugicollis houorei n. ssp. is described from Baja California; and R. meeskei Casey, 1891 is restored to species status. New synonymies are: R. incrustata Chevrolat, 1859 = R. tenuis (Chevrolat, 1855); R. laeuicollis LeConte, 1873 = R. cupricollis Guérin-Méneville, 1844. Distribution maps are included for the more common species. The subgenus Ischionodonta Chevrolat is raised to generic status, and includes 3 species: I. serripes (Bates, 1872) n. comb.; I. uersicolor (Chevrolat, 1859) n. comb.; andl. mexicana n. sp. from Mexico. CosmisomaAudinet-Serville is revised to include 6 species, with 2 newly described: C. militaris n. sp. from Panama and Costa Rica, and C. rhaptos n. sp. from Panama and ColombiabNew synonymies are: C. nudicornis Bates, 1892 = C. martyr Thomson, 1860, and C. alboscutellata linsley, 1935 = C. reticulata Bates, 1885. Cycnoderus Audinet-Serville is newly recorded from Mexico and Central America with 6 species: C. virginiae n. sp., C. copei n. sp., C. liuidus n. sp., C. breuicolle n. sp. from Mexico, and C. guatemalicus n. sp. from Guatemala. Cycnoderus barbatus Gounelle is recorded from Costa Rica and Panama. A new genus, Muxbalia, is proposed and tentatively placed in the Rhopalophorini, and M. monzoni n. sp. is described from Guatemala. Ozodes Audinet-Serville, and Lissozodes Bates are removed from the Rhopalophorini and placed provisionally in the Necydalopsini. Rhopalophora cupricollis, R. longipes, R. serripennis, Cycnoderus uirginiae, Cosmisoma rhaptos, and Muxbalia monzoni are illustrated.
A key to the subgenera of Anisostena Weise is presented. Apostena new subgenus is erected from angustata Pic and missionensis Monros & Viana; bondari Maulik and breveapicalis Pic are transferred from Anisostena s. str. to Anisostena (Neostena). Keys to the species of the subgenera Neostena and Aposostena are presented.
The 37 recognized Oxybelus of Central America and the Caribbean are listed, a key given, and the critical thoracic projections figured for many of the species. New species are coloratus (Mexico), irwini (El Salvador), jamaicae (Jamaica), melanitus (Mexico), morrisoni (Puerto Rico), propodealis (Honduras), rhodopyga (Mexico), and romingeri (Hispaniola). New synonyms of mexicanus Robertson 1889 are frontalis Robertson 1889, bugabensis Cameron 1891, and longispina Cameron 1891.