Genus Psorophora. 



161 



rather long and slender, apex with two spines and a small segment, 

 just below a long and a short spine ; a single spine towards apex 

 represents the lateral tuft, and there are a few (short) spines 

 towards the base on one side ; labial plate very broad and short, 



Fig. 45. 

 Comb scales of Psorophora ciliata (after Felt). 



a large apical tooth, 7-9 teeth on each side ; comb of eighth 

 segment consists of a large patch of minute scales edged with a 

 single row of 10-16 large scales, each with a large apical spine 

 and two to four smaller lateral ones; 20-30 spines on each 



Fig. 46. 

 Labial plate of Psorophora ciliata (after Felt.) 



lateral row of siphon, the spines long and thin with one or two 

 small basal teeth ; anal gills long, from 3 J to 4 times as long 

 as the anal segment. 



Synonomy. — Coquillett makes Culex rubidus, Desvoidy, a 

 synonym of this species. 



VOL. IV. 



