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.