Estudo da genitália externa masculina de duas espécies de Opisthacidius Berg, 1879 (Hemiptera, Reduviidae, Reduviinae)

In order to stablish new taxonomic characters for the genus Opisthcidius a detailed comparative study of the male external genitalia was performed in O. rubropictus (H. Shaeffer, 1848), the type species, and O. pertinax (Breddin, 1903), mantioned as predators of triatomines. The most representative phallic structures were: the median process of pygophore, the phallosoma struts and the vesica process.

Rhodnius stali n. sp., afim de Rhodnius pictipers Stal, 1872 (Hemiptera, Reduviidae, Triatominae)

Rhdnius stali n. sp. was described based on specimens deposited in the Herman Lent Collection of Entomological Collection of Oswaldo Cruz Institute, until now identified as Rhodnius pictipes Stal, 1872 and compared with specimens of R. pictipes proceeding from state of Amazonas and Pará, Brazil. R. stali is related to R. pictipes though distinguished by the total length, 15 to 17 mm male and 16,5 to 19 mm female, the anteocular region 2,5 times larger than postocular region and by the shape of phallic strictures known as: phallosoma, struts, gonopore process and endosoma process.

Revalidação do gênero Mepraia, Mazza, Gajardo & Jorg, 1940 (Hemiptera, Reduviidae, Triatominae)

The authors revalidate the genus Mepraia, described in 1940 by Mazza, Gajardo & Jörg. The genus is monotypic and represented by the species M. spinolai (Porter, 1934). Based on the characteres described below the authors considered the separation of the genus Triatoma Laporte, 1832 and the return of the genus Mepraia. Strongly alar polymorphism, the abdomen of female with connexivum like in genus Dipetalogaster Usinger 1939, seven testicular follicles, like in Triatoma, however with a different relation of lenghts; external male genitalia showing a big and foliar process of the conjunctiva, vesica with an arch-shape, struts and endosoma process absent.