Contributing to the understanding of Angiopolybia Araujo, 1946 (Hymenoptera, Vespidae, Polistinae): a new species, and descriptions of the nest of A. obidensis and male of A. zischkai.

Despite being a small genus, much remains unknown about the Neotropical social wasp genus Angiopolybia Araujo, 1946 (Polistinae: Epiponini). Here we describe the new species A. obscuriorina Barroso, sp.

Taxonomic account and phylogenetic relationships of the species of the Neotropical social wasp genus Chartergus Lepeletier, 1836 (Vespidae: Polistinae: Epiponini).

The Neotropical social wasp genus Chartergus is reviewed and comparative diagnoses, images of type material, and an updated identification key for species are presented. To investigate the phylogenetic relationships within the genus, we used a combined dataset of morphological characters, nest architecture traits, and molecular data. The results revealed the following relationships among the Chartergus species: (C.

Taxonomic notes on the genus Charterginus Fox, 1898 (Vespidae: Polistinae: Epiponini) with images of the type specimens and new occurrence records.

Charterginus Fox, 1898 is a neotropical genus of swarm-founding social wasps consisting of six species. Despite its ecological significance, there are limited studies on various aspects of these wasps. To address this, this study aims to provide a comprehensive comparative diagnosis for all Charterginus species, accompanied by high-quality images of the type material.

A Synopsis of Knowledge of the Rhopalosomatidae (Hymenoptera) in Brazil: an Annotated Checklist of the Family in the Country, with a Revised Key to the Brazilian Genera.

This study is focused on the cricket leeches, Rhopalosomatidae, a family that is only poorly represented in entomological collections in Brazil. We provided a revised and updated key to the genera occurring in Brazil with the major traits of genera illustrated through high-resolution photomicrography. Also, we provided a synopsis of genera, a list of the species currently recorded from Brazil, the first country records for Rhopalosoma minus Townes, 1977 and Rhopalosoma breelandi Townes, 1977, which increases the diversity of these wasps in the country.