This paper reports the first occurrence of the parasite Aphaereta sp. (Hymenoptera: Braconidae: Alysiinae) which was collected from Peckia chrysostoma pupae (Diptera: Sarcophagidae) by means of traps containing some fish baits in a wood area close to the Agronomy college (Faculdade of Agronomia) in Itumbiara, Goias, in the period from March to September, 2001. A total of 362 gregarious specimens of parasitoids from 26 pupae of P. chrysostoma. Aphaereta sp. was collected, with several individuals emerging from the same pupae. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Land and freshwater zones; Neotropical region; South America Peckia chrysostoma (Sarcophagidae); Hymenopteran parasites; Aphaereta; New host record & prevalence; Brazil; Goias; Itumbiara; New hymenopteran parasite record & prevalence Aphaereta (Braconidae); Dipteran hosts; Peckia chrysostoma; New host record & prevalence; Brazil; Goias; Itumbiara; New dipteran host record & prevalence none no species