The Bionomics of Chaetophleps Setosa Coquillett (Diptera: Tachinidae)1

Chaetophleps setosa Coq. is a well known internal parasite of the striped cucumber beetle, Diabrotica vittata Fabr. This tachinid was first described by Coquillett (1895) under its present generic and specific name from one pair of adult flies captured in Maryland. Walton (1914) redescribed it, gave it the name ferox and assigned it to Neocelatoria. This description is accompanied by a figure of the wing. According to Dr. J. M. Aldrich, the presence of spines on the first radial vein (R1) is the best character by which members of the genus Chaetophleps can be recognized. Walton's figure shows such spines on the first vein, indicating that his species belongs to Chaetophleps. When Dr. Aldrich later called his attention to this probability, Walton (1914a) concluded that Neocelatoria ferox is a synonym of Chaetophleps setosa.