Two new species of Grotea Cresson (Hymenoptera, Ichneumonidae, Labeninae) from Brazil.

Two new species of Grotea Cresson are described from Brazil, Grotea claudiae Kumagai sp. n. and G. fernandoi Lima sp. n. New records and identification key for Brazilian species of Grotea are provided. Grotea amazonensis Herrera-Flrez, 2019 is proposed as nomen nudum.

Revision of Hellwigiella Szépligeti, 1905 (Hymenoptera, Ichneumonidae, Ophioninae), with revalidation of H. nigripennis Szépligeti, 1905.

The taxonomic history of Hellwigiella Szépligeti is presented with comments. Ophion similis (Szépligeti, 1905) is diagnosed and illustrated, with the first record for Morocco. Hellwigiella is redescribed and illustrated, with comments on its differentiation from O. similis. A key to the two valid species, H. dichromoptera and H. nigripennis stat. rev., is provided.

The New World species of Leucospis Fabricius, 1775 (Hymenoptera, Chalcidoidea, Leucospidae): an update of Boucek's revision with description of two new species from Brazil.

The revision of Leucospis Fabricius (Hymenoptera: Leucospidae) by Boucek (1974a) is updated for the New World species based on material deposited in Brazilian collections. We provide a key to the New World species including all species described after Boucek, describe two new Brazilian species, Leucospis copepucu sp. nov. and L. muru sp. nov. describe the male of Leucospis opalescens Weld, 1922, and provide diagnoses and illustrations for ten other Brazilian species and one Argentinian species and comments on new geographic records for Brazilian species, with maps.

Lathrolestes Förster, 1869 (Hymenoptera, Ichneumonidae) from Brazil, with description of two new species and a key to the Neotropical species.

The taxonomic knowledge about Brazilian Ichneumonidae species is still incipient, especially for groups poorly represented in the Neotropics, like Ctenopelmatinae. The genus Lathrolestes Förster, 1869, mainly Holarctic, is here recorded for the first time to Brazil, with description of L. piranga Lima & Kumagai sp. n. and L. pitunauassu Lima & Kumagai sp. n. Additionally, a key to the Neotropical species is provided.

The uncommon Neotropical genus Pazius Navás, 1913 (Mecoptera: Bittacidae): a comprehensive synthesis, with description of a new Brazilian species.

After a gap of more than twenty years, only recently the uncommon Neotropical genus Pazius Navás, 1913 has been focus of scientific researches, with the description of two new species from Colombia. Here all the knowledge about the genus is synthetized, with an identification key to all species, including comprehensive illustrations of male's terminalia and the description of Pazius angaibara sp. nov. from Northern Brazil. Also, a geographic records map of the genus is included.

Review of the Neotropical species of Stauropoctonus Brauns, 1889 (Hymenoptera: Ichneumonidae: Ophioninae).

The taxonomy of Neotropical species of Stauropoctonus is reviewed, with redescriptions of S. bicarinatus and S. excarinatus, the description of four new Brazilian species, S. amazonensis sp. n., S. leotacilioi sp. n., S. michelle sp. n., and S. rectus sp. n., and for the first time with a detailed study of the male genitalia of the genus. Additionally, we provide a key to the world Stauropoctonus species.