60 Pipunculidae. 



hairs, among these a couple of posthumeral, a notopleural, a supraalar 

 and two postalar bristles can be discerned and also a pair of less con- 

 spicuous dorsocentral bristles; scutellum has four distinct marginal 

 bristles. Mesopleura with some longish hairs just behind the suture. 

 Abdomen a little flattened; it has in the male six not transformed 

 dorsal segments, the last being the smallest, and five ventral segments; 



Fig. 31. Wing of Ch. spurius ^. 



on the left side the seventh dorsal segment is seen, bending down on 

 the underside. The exterior genitalia are otherwise constructed 

 mainly as in Pipunculus, but smaller and there is no large membraneous 

 impression in the eight segment, but it is apparently divided into 

 two pieces by a longitudinal split above on the right side, the left 

 piece being the larger, the right smaller and a little compressed. 

 In the female abdomen has six normally developed segments, the 



Fig. 32. Wing of Ch. spurius $. 



hypopygium with its ovipositor is similar to that in Pipiinculus; 

 the hairs on abdomen are long at the sides and espeeially so on first 

 segment; the male hypopygium has also longish hairs. Legs some- 

 what slender, hind tibiæ formed as in Pipiinculus; anterior femora 

 with long hairs on the posteroventral side and hind femora likewise 

 on the anteroventral side in the apical half, tibiæ short-haired, only 

 hind tibiæ with one or a couple of long hairs above on the middle; 

 claws and pulvilli of medium size, empodium short, bristle-shaped, 

 with hairs below. Wings somewhat long, alula very small, practically 

 absent, axillary lobe somewhat developed in the male, wanting in 

 the female; the end of the mediatisnal cell coloured, but the colouring 

 not reaching quite to the apex of the mediastinal vein, third costal 



