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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Florida Entomological Society is collaborating with JSTOR to digitize, preserve and extend access to The Florida Entomologist. ABSTRACT This paper provides an illustrated key in English and Portuguese to 18 South American species of Pseudacteon decapitating flies that attack Solenopsis fire ants in the saevissima complex. The taxonomic history and current status of species in the genus Pseudacteon are discussed. Pseudacteon flies are of interest because of their unusual life history and potential value as classical fire ant biocontrol agents.Este trabalho fornece uma chave ilustrada em ingles e portugues para 18 especies sul americanas de Pseudacteon que atacam formigas lava-pes Solenopsis do complexo saevissima. A hist6ria taxon6mica e a posibdo atual das especies no genero Pseudacteon sao discutidas. As pequenas moscas Pseudacteon sao de interesse devido a sua ciclo de vida incomum e potencial valor como agentes de biocontrole classico das formigas lava-p6s. Florida Entomologist 84(4)

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-The external ant community of Hospital Municipal de Morrinhos, in Morrinhos, Goiás State, was characterized by the low rates of richness, diversity, dominance and equity of species abundance. Pheidole sp.1, a polygynic species was numerically dominant in this environment, although it coexists with potentially competitive species. This ant species prevailed within all hospital departments and its space-time distribution was a little aggregated (variance/mean ratio = 1.102, χ 2 = 29.38, P < 0.01). Escherichia, Salmonella, Aeromonas, Enterococcus, Staphylococcus and Klebsiella were the bacteria associated to this ant species in nearly all hospital annexes. The unicolonialism of Pheidole sp.1 tends to increase the contamination and dissemination process of infecto-contagious agents. The control and management of this ant species must be followed by practices that reduce the colonization process by other queens and the quantity of site nidifi cation within the hospital.KEY WORDS: Urban ant, Pheidole, polygyny, community RESUMO -A comunidade de formigas da área externa ao hospital do Hospital Municipal de Morrinhos, GO, caracterizou-se pelos baixos índices de riqueza, diversidade, dominância e eqüidade de abundância das espécies. Pheidole sp.1, uma espécie poligínica, dominou esse ambiente apesar da coexistência com espécies potencialmente competitivas. A mesma espécie de formiga predominou no interior de praticamente todas as repartições do hospital e sua distribuição espaço-temporal aproximou-se da agregada (variância/média = 1.102, χ 2 = 29.38, P < 0.01). Escherichia, Salmonella, Aeromonas, Enterococcus, Staphylococcus e Klebsiella foram os gêneros de bactérias associados a essa espécie de formiga em praticamente todas as repartições do hospital. O unicolonialismo de Pheidole sp.1 tende a potencializar o processo de contaminação e disseminação de agentes infecto-contagiosos. O manejo e controle da espécie devem ser acompanhados de técnicas que reduzam o processo de colonização por novas rainhas e a quantidade de locais de nidifi cação no interior do hospital. PALAVRAS-CHAVE: Formiga urbana, Pheidole, poliginia, comunidadeVárias espécies de formigas se beneficiam com a presença do homem, tanto na zona rural como na urbana, e algumas destacam-se como pragas devido aos problemas ocasionados direta ou indiretamente à população humana (Vinson 1986, Vander Meer et al. 1990. Espécies de formigas que vivem no interior de edifi cações em ambiente urbano são caracterizadas pelo tamanho corporal pequeno, poliginia, mobilidade das colônias e unicolinialismo (Passera 1994). As principais espécies consideradas pragas urbanas no Brasil são exóticas, destacando-se Monomorium pharaonis (L.), Monomorium fl oricola Jerdon, Paratrechina longicornis (Latreille) e Tapinoma melanocephalum (Fabricius) . Linepithema humile (Mayr), Paratrechina fulva (Mayr), Wasmannia auropunctata (Roger) e algumas espécies de Camponotus, Pheidole, Brachymyrmex e Solenopsis, nativas do Brasil, também são importantes pragas urbanas.A infecção hospi...

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Ants, an ecologically successful and numerically dominant group of animals, play key ecological roles as soil engineers, predators, nutrient recyclers, and regulators of plant growth and reproduction in most terrestrial ecosystems. Further, ants are widely used as bioindicators of the ecological impact of land use. We gathered information of ant species in the Atlantic Forest of South America. The ATLANTIC ANTS data set, which is part of the ATLANTIC SERIES data papers, is a compilation of ant records from collections (18,713 records), unpublished data (29,651 records), and published sources (106,910 records; 1,059 references), including papers, theses, dissertations, and book chapters published from 1886 to 2020. In total, the data set contains 153,818 ant records from 7,636 study locations in the Atlantic Forest, representing 10 subfamilies, 99 genera, 1,114 ant species identified with updated taxonomic certainty, and 2,235 morphospecies codes. Our data set reflects the heterogeneity in ant records, which include ants sampled at the beginning of the taxonomic history of myrmecology (the 19th and 20th centuries) and more recent ant surveys designed to address specific questions in ecology and biology. The data set can be used by researchers to develop strategies to deal with different macroecological and region‐wide questions, focusing on assemblages, species occurrences, and distribution patterns. Furthermore, the data can be used to assess the consequences of changes in land use in the Atlantic Forest on different ecological processes. No copyright restrictions apply to the use of this data set, but we request that authors cite this data paper when using these data in publications or teaching events.