Carpenter et al.: Mosquitoes of Southern U. S. 141 



Preantennal (A) double or triple, sparsely barbed; lower (B) and upper (C) 

 long, single; postclypcal (d) small, branched; sutural (e) and trans-sutural (f) 

 2 to 4-branched; supraorbital, single or double. Comb of eighth segment of 

 four, rarely five, thorn-shaped scales; individual scale trifid, with long central 

 tooth. Siphon strongly inflated, about two and one-half to three times as long 

 as basal width; pecten of three to five teeth on basal third of siphon; subventral 

 tuft minute, multiple, inserted laterally beyond middle of siphon; hair of lateral 

 valve longer than apical width of siphon. Anal segment somewhat longer than 

 wide, completely ringed by the dorsal plate; lateral hair small, multiple; dorsal 

 brush consisting of a long lower caudal hair and a shorter multiple upper 



Fig. 72. Larva of Psorophora cyanescens (Coquillett). A, Terminal 

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



