Abstract.Here we present new geographical records for Probethylus callani Richards, 1939 and Probethylus schwarzi Ashmead, 1902 in Brazil.

The neotropical genus Athacryvac Braet & van Achterberg was recently described based on two species from French Guiana. Despite the resemblance of these species with the diverse and widespread genus Aleiodes, the authors opted to erect the new genus based on several synapomorphies. With the analysis of more comprehensive morphological and geographical variation we propose reclassifying Athacryvac as a subgenus within Aleiodes. In this paper we describe 11 new neotropical species of the subgenus Athacryvac: Aleiodes (Athacryvac) achterbergi Shimbori & Penteado-Dias sp. nov., Aleiodes (Athacryvac) amazoniensis Shimbori & Almeida sp. nov., Aleiodes (Athacryvac) braeti Shimbori & Shaw sp. nov., Aleiodes (Athacryvac) choco Shimbori sp. nov., Aleiodes (Athacryvac) donaldquickei Shimbori & Penteado-Dias sp. nov., Aleiodes (Athacryvac) gonzalezi Shimbori & Shaw sp. nov., Aleiodes (Athacryvac) paradoxus Shimbori & Penteado-Dias sp. nov., Aleiodes (Athacryvac) soaresi Shimbori & Penteado-Dias sp. nov., Aleiodes (Athacryvac) tico Shimbori & Shaw sp. nov., Aleiodes (Athacryvac) torresi Shimbori & Shaw sp. nov., Aleiodes (Athacryvac) zaldivari Shimbori & Almeida sp. nov. We also provide new morphological and distributional data for the previously described A. alternatus and A. fuscatus, as well as the description of the male of the later species. The 13 known species of Aleiodes (Athacryvac) stat. nov. are restricted to the Neotropical Region, ranging from southern Mexico to southern Brazil. With our current results, there are 104 described neotropical Aleiodes species.

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.

Aleiodes Wesmael is the most diverse rogadine genus worldwide, with specialized koinobiont endoparasitic development in Lepidoptera caterpillars resulting in mummification of the host remains. This paper focuses on describing new Aleiodes species from the Yanayacu Biological Station, with special interest in those with biological information. We describe 24 new species (Aleiodes albidactyl sp. n., Aleiodes albigena sp. n., Aleiodes albiviria sp. n., Aleiodes bimaculatus sp. n., Aleiodes cacuangoi sp. n., Aleiodes colberti sp. n., Aleiodes delicatus sp. n., Aleiodes dyeri sp. n., Aleiodes elleni sp. n., Aleiodes falloni sp. n., Aleiodes frosti sp. n., Aleiodes kingmani sp. n., Aleiodes longikeros sp. n., Aleiodes luteosicarius sp. n., Aleiodes marilynae sp. n., Aleiodes mirandae sp. n., Aleiodes napo sp. n., Aleiodes nubicola sp. n., Aleiodes onyx sp. n., Aleiodes shakirae sp. n., Aleiodes stewarti sp. n., Aleiodes townsendi sp. n., Aleiodes tzantza sp. n., and Aleiodes yanayacu sp. n.) from Napo Province in Ecuador, 16 of which were reared from host caterpillars. With these results 89 species of Neotropical Aleiodes are now known, with 41 of them having host records. The most commonly reared species were in the circumscriptus/gastritor species-group, and mostly associated with Geometridae hosts (six of ten species). Three species of seriatus species-group, in contrast, were each reared from a different family. One of these species (i.e. A. frosti sp. n.), reared from Notodontidae, cuts a posterior radial opening in the mummy for emergence, a unique behavior in Aleiodes, recorded here for the first time. A. luteosicarius sp. n. is the first described species from Ecuador in the pallidator species-group. Differing from previously described pallidator species, which attack only Lymantriinae larvae, A. luteosicarius sp. n. attacks several species of Arctiinae larvae, being both subfamilies within Erebidae with densely setose caterpillars. We also describe new species of the gressitti and pulchripes species-groups.