A new species of brachypterous Mesepipsocus, the first species of this genus recorded in Bolivia, is here described and illustrated. It has caeciliusid wing venation, and the gonapophyses lack V1. The type is deposited in the National Collection of Insects,…

A new unusual Uropodina mite (Uroobovella vazquezae sp. nov.) is found in the tropical part of Mexico. The new species is easy to separate from the other known Uroobovella species on the basis of the cavities on dorsal and ventral…

A new species of the Dahlibruchus genus is described and information is given about its bionomics and host plants, also are mentioned general aspects about the archeological site where the insect was found.

Diplocentrus churumuco sp. nov., from the Balsas River Basin in Michoacan, Mexico is described and clearly differentiated from its nearest relatives. The tarsomere II spine formula is 4/4:4/4:5/5:5/5. Pectinal tooth counts are 9- 10 in males, and 7- 8 in…

Paryphoconus peruvianus, a new species from Peruvian Amazonia is described and illustrated from female and male specimens collected at light in the Department of Cuzco. The species is compared with its similar congener P. anomalicornis Kieffer. Furthermore, P. anomalicornis, P.…

Euphorbia spellenbergiana is described and illustrated as a new species. It belongs to subgenus Chamaesyce within which it is easily distinguished from similar species by its possession of undivided styles with capitate stigmas. This new species is endemic to Mexico…

Five species in two genera of pteropods, Limacina conica (Koenen, 1892), L. hospes Rolle, 1861, L. karasawai new species, Limacina sp. and Creseis kishimaensis new species, are described from the Oligocene Kishima Formation of Saga Prefecture, northwestern Kyushu, southwest Japan.…

Semiscolex lamothei sp. nov. from Catemaco lake, Veracruz, México, is described based on the examination of 18 specimens. The new species differs from other species of the genus by the presence of 1/2 + 5 + 1/2 annuli between gonopores.…

The doryctine wasp genus Hecabolus Curtis and its type species, H. sulcatus Curtis, are redescribed. A new species from Mexico, H. mexicanus sp. nov., is described and illustrated. The new species is distinguished from H. sulcatus and the other known…

A new species, Ischnodemus brusai, from Ucayali, Peru is described and illustrated, including characters of the male genitalia. Adult males and females, and immature specimens of I. subflavus Slater and Wilcox 1969 were collected on Sporobolus rigens (Trinius) Desvaux (Poaceae)…