A new species of Olixon Cameron, 1887 (Hymenoptera: Rhopalosomatidae) and new records for the genus in Brazil.

Olixon Cameron, 1887 is a genus of solitary wasps belonging to Rhopalosomatidae with 28 species worldwide, all of which are distinct being brachypterous and having the inner eye margins straight. In this paper, we describe Olixon pantanensis Bulbol, Bartholomay & Somavilla sp. nov., based on a male from the Brazilian Pantanal biome and provide new distribution records for O. testaceum Cameron, 1887 in the country. We also provide the first descriptions and illustrations of the male genitalia for both species.

A New Species of Liosphex Townes, 1977 (Hymenoptera: Rhopalosomatidae) from the Amazon Forest and New Records for the Genus in Brazil.

Liosphex Townes, 1977 is a genus of solitary wasps belonging to the family Rhopalosomatidae, whose larvae develop as ectoparasitoids of crickets. In this paper, both sexes of a new species of the genus are described, Liosphex amazonensis Bulbol & Somavilla sp. n. Three other species, Liosphex achuar Lohrmann, 2010, Liosphex atratus Lohrmann, 2010, and Liosphex bribri Lohrmann, 2010, are recorded for the first time in Brazil. The male of Liosphex guanabara Lohrmann, 2010 is described for the first time, and the species is registered for the state of Bahia. In addition, the first detailed descriptions and illustrations of male genitalia of three species of the genus, i.e., L. amazonensis sp. n., L. atratus, and L. guanabara, are provided.