140 



The Pupa of CJiironorniis 



Legs and 

 wings. 



prominences (fig. 105). In Clilronomus nivelpennis each 

 of tliese pupal prominences bears a long seta (see p. 14). 



The legs of the pupa are doubled up in the manner 

 shown in Plate, fig. 5. Short-legged Dipterous pupae have 



Fig. 105. — Imaginal head, still enclosed in pupal 

 skin (male), front view, p, processes on vertex 

 of pupa, enclosing p', processes on vertex of fly. 

 6, enlarged second joint of antenna of fly. o, com- 

 pound eye. Ip, tip of labial palp, r, rostrum. 

 lb, labiuni, rt, antenna. Of. fig. 63. 



Pupal 

 abdonion. 



the legs extended. Legs, wings, and antennae have their 

 own pupal sheaths, which fit closely, and are not glued 



to the body. The 

 pupal wing is of 

 simple outline, and 

 much smaller than 

 that of the fly, which 

 is crumpled up with- 

 in it. The haltere is relatively larger and more wing-like 

 in the pupa than in the fly. 



The pupal skin which invests the abdomen of the fly is 

 expanded laterally into paired flanges, which are fringed 



Pig. 106. — Foot of fly in pupal cuticle 



