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American Midland Naturalist Monograph No. 3 



tergite (IXT-L) only slightly raised, separated by about the width of one lobe, 

 each bearing several setae. Tenth sternite (X-S) crowned with numerous short 

 spines, the apical ones pointed, the outer ones blunt; basal arm (XS-BA) long, 

 stout, strongly curved, heavily sclerotized. Pballosome (Ph) formed of two 

 large heavily sclerotized plates. Each plate basally with a long pointed dorsal 

 arm (Ph-DA), directed posteriorly and nearly reaching the crown of the tenth 



£, H A ^rofi 



Fig. 143. Larva of Culex tarsalis Coquillett. A, Terminal segments. 

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



