The araneid spider genus Verrucosa McCook, 1888 is revised. Five of the seven previously known species, V. arenata (Walckenaer, 1841), V. lampra Soares & Camargo, 1948, V. meridionalis (Keyserling, 1892), V. undecimvariolata (O. Pickard-Cambridge, 1889) and V. zebra (Keyserling, 1892), are redescribed and illustrated. In addition, 37 new species of Verrucosa from the Neotropical region are desc...

The genus Calliscelio Ashmead is presumed to be a diverse group of parasitoids of the eggs of crickets (Orthoptera: Gryllidae). A least one species has been found to be an important factor in depressing cricket pest populations. The New World species of Calliscelio are revised. Forty-two species are recognized, 3 are redescribed: Calliscelio bisulcatus (Kieffer), Calliscelio laticinctus Ashmead...

We revise the large Neotropical genus Operclipygus Marseul, in the histerid tribe Exosternini (Histeridae: Histerinae). We synonymize 3 species, move 14 species from other genera, sink the genus Tribalister Horn into Operclipygus, and describe 138 species as new, bringing the total to 177 species of Operclipygus. Keys are provided for the identification of all species, and the majority of the s...

Twenty three new species of Exocelina Broun, 1886 from New Guinea are described herein: Exocelinabewaniensis sp. n., Exocelinabismarckensis sp. n., Exocelinacraterensis sp. n., Exocelinagorokaensis sp. n., Exocelinaherowana sp. n., Exocelinajimiensis sp. n., Exocelinakisli sp. n., Exocelinaksionseki sp. n., Exocelinalembena sp. n., Exocelinamantembu sp. n., Exocelinamichaelensis sp. n., Exoceli...

The genus Hybos Meigen in Thailand is revised and full descriptions and keys provided for all 41 species. Thirty-four new species are recognized: H. aceriformis sp. nov., H. ancyclochiles sp. nov., H. anisoserratus sp. nov., H. bispinatus sp. nov., H. chaweewani sp. nov., H. daugeroni sp. nov., H. divisus sp. nov., H. grootaerti sp. nov., H. hylobates sp. nov., H. inthanonensis sp. nov., H. kal...

The species of the Neotropical genus Opeatocerata Melander are revised to include 21 species, with fifteen species described as new: O. agudeloi sp. nov., O. ampullaria sp. nov., O. bare sp. nov., O. brasiliensis sp. nov., O. chaetohypandrialis sp. nov., O. cylindrophallus sp. nov., O. curvipenis sp. nov., O. hadrophallus sp. nov., O. megalophallus sp. nov., O. mourai sp. nov., O. nhamunda sp. ...

Twenty-eight new species of the genus Ypsiloncyphon are described from Southeast Asia. The new species described in this paper are as follows: Y. laosensis sp. n., Y. myanmarnus sp. n., Y. nomurai sp. n., Y. bifurcatus sp. n., Y. bicornutus sp. n., Y. borneensis sp. n., Y. brachytrigonium sp. n., Y. garoensis sp. n., Y. kedahensis sp. n., Y. prolongatus sp. n., Y. guamensis sp. n., Y. philippin...