CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 243 



Pupa. — No puparium; occupying small cells near the surface of 

 the ground in a vertical position. 



Broods. — There are two broods each season. Larvae winter over 

 and change to pupae in late May. Adults soon appear and deposit 

 eggs from which hatch the maggots. These change to pupae and 

 adults in September when eggs are laid for a fall brood. The maggots 

 hatching from these eggs winter over. 



Control. — Early fall plowing, draining, and rotation of crops. 



Fig. 153.- — Tipula. 



A, Larva; B, cast pupal skin; C, imago. 

 {After Folsom.) 



Slightly reduced. 



CULICID^ (MOSQUITOES) 

 Key to The Common Genera 



A. Palpi in both sexes at least almost as long as the proboscis. — Anopheles. 

 AA. Palpi in both sexes less than one-half as long as the proboscis. — Aedes. 

 AAA. Palpi in the male at least nearly as long as the proboscis; in the female less 

 than one-half as long. — Culex. 



This family includes several important economic genera, comprising 

 many hundreds of species. The more important of these are Culex 

 pipiens, C. pungens, Anopheles maculipennis , and Stegomyia fas data = 

 Aedes calopus. 



House Mosquito {Culex pipiens Linn.). Adult. — A slender-bodied, 

 delicate fly with gauzy wings, the. veins bearing minute scales; deep 

 yellowish to dark brown; legs and beaks not banded; abdomen with 

 narrow whitish bands at the base of each segment. Hibernates as 

 adult (Fig. 154). 



