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.

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. and E. merceae Fernandes sp. nov.) are described from the northwestern Andes of Colombia. Furthermore, we propose the establishment of a new species-group, E. nigroandinum species-group, to encompass these newly described species. Additionally, we expand the geographical distribution of Eiphosoma vitticolle Cresson, 1865, and complement the findings with a map and digital images.

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.. In addition, diagnoses, maps, and digital images are presented.