270 



American Midland Naturalist Monograph No. 3 



head, constricted beyond antennal tuft, with portion before constriction spinose, 

 portion beyond constriction more sparsely spined; antennal tuft large, multiple, 

 barbed, inserted at outer third, reaching beyond tip of antenna. Head hairs: 

 Preantennal (A) multiple, barbed, reaching near insertion of antennal tuft; 

 lower (B) single, barbed, not reaching beyond preclypeus; upper (C) single, 

 occasionally double, barbed, about half as long as lower (B) and much weaker; 

 postclypeal (d) small, single; sutural (e) and trans-sutural (f) small, multi- 

 ple; supraorbital usually double or triple. Body spicular. Upper lateral abdomi- 

 nal hairs usually triple on segments I and II and double on III to VI. Comb 



C KA i-foii 



Fig. 151. Larva of Culex pilosus (Dyar and Knab). A, Terminal 

 segments. B, Head. C, Pecten tooth. D, Comb scale. 



