Six new species of Hymenoepimecis Viereck are described from Brazilian Amazonian tropical forest: H. amazonensis sp. n., H. duckensis sp. n., H. kleini sp. n., H. manauara sp. n., H. ribeiroi sp. n. and H. uberensis sp. n., and male genitalia is described for the first time for the genus. In addition, we provide an identification key, diagnosis and distributional records for Brazilian Amazonian species of Hymenoepimecis. By describing these new species we aim to draw further attention to the considerable species richness of the genus in Amazonia.

ABSTRACT. A checklist composed of 105 species of parasitic Hymenoptera, which includes the non-aculeate Apocrita, recorded in the state of Mato Grosso do Sul (MS), Brazil, is presented. A new list, containing 153 genera obtained in recent surveys is also presented; out of these 131 are new records. The major knowledge gaps for these organisms in the State and the prospects for future studies for these organisms are discussed.

Campopleginae (Hymenoptera, Ichneumonidae) fauna in organic crops in Araraquara and São Carlos, São Paulo State, Brazil. From March 2006 to February 2007 twelve samples were performed using Malaise traps in each of the three studied organic crop areas. A total of 1773 specimens were identified in ten Campopleginae genera: Campoctonus Viereck, 1912, Campoletis Föster, 1869, Casinaria Holmgren, 1859, Charops Holmgren, 1859, Cryptophion Viereck, 1913, Diadegma Föster, 1869, Dusona Cameron, 1900, Hyposoter Förster, 1869, Microcharops Roman, 1910 e Venturia Schrottky, 1902. The richness and diversity of genera indices found were very similar. A low evenness was observed with Campoletis, Venturia and Casinaria being the most common and abundant genera. Viereck, 1912, Campoletis Föster, 1869, Casinaria Holmgren, 1859, Charops Holmgren, 1859, Cryptophion Viereck, 1913, Diadegma Föster, 1869, Dusona Cameron, 1900, Hyposoter Förster, 1869, Microcharops Roman, 1910 e Venturia Schrottky, 1902. A riqueza e diversidade de gêneros foram semelhantes nos locais amostrados. Verificou-se baixa uniformidade, sendo Campoletis, Venturia e Casinaria os gêneros mais comuns e abundantes. Palavras-chave: agricultura orgânica, região neotropical, parasitoides, taxonomia.

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.

Resumo. Este trabalho teve por objetivo realizar um levantamento da fauna de Ichneumonidae (Hymenoptera) em cultivo de coqueiro anão verde e avaliar a influência de plantas invasoras sobre esta fauna. As amostragens foram realizadas semanalmente durante o período de março/2008 a fevereiro/2009, utilizando armadilhas Möericke em uma área mantida roçada e outra com a presença de plantas invasoras. Foram obtidos 569 exemplares pertencentes a 11 subfamílias. Cryptinae representou mais de 50% do material coletado nos dois ambientes e, dentre as subfamílias ophioniformes, nove gêneros foram identificados, sendo Anomalon e Dusona os mais abundantes. A área com plantas invasoras apresentou maior número de subfamílias e abundância de indivíduos coletados em relação à área mantida roçada. Entretanto, diferenças significativas na abundância foram constadas somente para Cryptinae e Ichneumoninae.Palavras-Chave: Cocos nucifera; Controle biológico conservativo; Parasitoides. A total of 569 specimens were identified in 11 subfamilies. Cryptinae corresponded to more than 50% of the total ichneumonids collected in the two studied areas and, among the ophioniformes subfamilies, 9 genera were identified, being Dusona and Anomalon the most abundant. The area with invasive plants presented a higher number of subfamilies and abundance of specimens. However, significant differences in abundance were observed only to Cryptinae and Ichneumoninae. Survey of the Ichneumonidae (Hymenoptera) Fauna in Coconut Palm