ORDER. HYMENOPTERA 



297 



Fig. 236. — Pimpla conquisitor, an important parasite of the tent cater- 

 pillar: a, larva, enlarged; 6, head of same, still more enlarged; c, pupa; d, 

 adult female, enlarged; e, f, end of abdomen of adult male, still more 

 enlarged. (From Fourth Report, U. S. Ent. Con.) 



Fig. 237. — Apanlcles glomeratus: a, adult fly; 6, cocoon; c, flies escaping 

 from cocoons; a, 6, highly magnified; c,. natural size. (After Chittenden, 

 Div. Ent., U. S. Dept. Ag.) 



