Social wasps (Polistinae) from Pampa Biome: South Brazil, Northeastern Argentina and Uruguay

. This study aimed to determine social wasps’ species from Pampa Biome. Were examined samples of social wasps from south-central of Rio Grande do Sul state (Brazil), parts of Buenos Aires, Entre Rios, Corrientes, Cordoba, Santa Fe and La Pampa provinces (Argentina) and in Uruguay maintained in the Colecao Entomologica de Santa Cruz do Sul (Santa Cruz do Sul-Brazil), American Museum of Natural History (USA), Natural History Museum (London-United Kingdom) and Museum National d’Histoire Naturelle (Paris-France). Thirty species were recorded: Agelaia (01), Brachygastra (01), Mischocyttarus (04), Polistes (15), Polybia (08) and Protonectarina (01). Vespas sociais do Bioma Pampa: sul do Brasil, nordeste da Argentina e Uruguai. Resumo. Este estudo objetivou determinar as especies de vespas sociais provenientes do Bioma Pampa. Foram examinadas vespas sociais provenientes de coletas da regiao centro-sul do Rio Grande do Sul (Brasil), parte das provincias de Buenos Aires, Entre Rios, Corrientes, Cordoba, Santa Fe e La Pampa (Argentina) e Uruguai depositadas na Colecao Entomologica de Santa Cruz do Sul (Santa Cruz do Sul-Brasil), American Museum of Natural History (Nova Iorque-USA), Natural History Museum (Londres-Reino Unido) e Museum National d’Histoire Naturelle (Paris-Franca). Trinta especies foram registradas: Agelaia (01), Brachygastra (01), Mischocyttarus (04), Polistes (15), Polybia (08) e Protonectarina (01).