The Darwin wasp Camera thoracica (Szpligeti, 1916) (Ichneumonidae) as a natural enemy of the dreaded Brazilian wandering spider Phoneutria nigriventer (Keyserling, 1891) (Ctenidae).

Wandering spiders (genus Phoneutria) hold a prominent position as some of the worlds most medically significant venomous arachnids, especially in Brazil. In this study, we record and illustrate for the first time, the Darwin wasp Camera thoracica (Szpligeti, 1916) as a natural enemy of the ctenid Phoneutria nigriventer (Keyserling, 1891). Furthermore, we provide a description of the previously unknown male wasp, update and standardize the description of the female, and provide biological notes.

Synopsis of Lusius Tosquinet, 1903 (Hymenoptera: Ichneumonidae: Phaeogenini) from South America: a new species, new records, and key to Neotropical species.

A new species of Lusius Tosquinet, 1903 (Hymenoptera: Ichneumonidae: Phaeogenini) is described from the northwestern Andes of Colombia, and additionally, the geographic distribution of Lusius ferrugineus Graf, 2000 is expanded to Bahia and Rio Grande do Sul states, Brazil. New comparative diagnoses, distribution maps, and an illustrated key to Neotropical species are also provided.

Redescription of Hybusa occidentalis (Westwood) (Orthoptera: Proscopiidae: Hybusinae): new images, description of male genitalia, pictorial key of Hybusa species and morphological comparison of Hybusinae with Xeniinae and Proscopiinae.

Proscopiidae (Orthoptera: Caelifera) are grasshoppers found in Central and South America, often mistaken for true stick insects (Phasmatodea) due to their stick-like appearance. The family comprises three subfamilies: Hybusinae, Proscopiinae, and Xeniinae, with Hybusinae as the smallest subfamily, housing the genus Hybusa Erichson, which contains four species endemic to Chile. Considering that the most recent comprehensive taxonomic assessment of this genus was conducted approximately three decades ago, herein we redescribe the type species of Hybusa, H.

Two new Darwin wasp species of Eiphosoma Cresson, 1865 (Ichneumonidae: Cremastinae) from the northwestern Andes of Colombia.

Two new Darwin wasp species of Eiphosoma Cresson, 1865 (E. nigroandinum Fernandes sp. nov.

First record of the Darwin wasp Hymenoepimecis Viereck, 1912 (Hymenoptera: Ichneumonidae: Pimplinae) from Argentina and Bolivia, with description of a new species.

Hymenoepimecis Viereck, 1912 is a Neotropical polysphinctine genus which occurs from Central America to the south of Brazil. In this study the genus Hymenoepimecis Viereck, 1912 is recorded for the first time in Bolivia and Argentina, and a new Brazilian species from Atlantic Forest is described: Hymenoepimecis atlantica sp. n.

Redescription and oviposition behavior of an orb-weaver spider parasitoid Hymenoepimecis cameroni Townes, 1966 (Hymenoptera: Ichneumonidae).

Strategies to invade and exploit hosts for survival are an essential part of the parasitic lifestyle. Species of the Polysphincta genus group (Hymenoptera: Ichneumonidae), which utilize spiders as hosts, are examples of parasitoids that present several behavioral strategies in host immobilization and egg laying. In this study, we characterized the oviposition behavior of the Darwin wasp Hymenoepimecis cameroni Townes, 1966 (Hymenoptera: Ichneumonidae) on their host spider, performed the taxonomic description of the female, and redescribed the male parasitoid.