The Brazilian species Halictophagus lappidae Oliveira & Kogan, 1960 and H. lopesi Oliveira & Kogan, 1959 are redescribed (Strepsiptera, Halictophagidae); H. ararensis, sp. n. (type-locality: Brazil, São Paulo, Araras) is described, and a new record for H. insularum (Pierre, 1908) is furnished.