THE DIPT ERA 



307 



has unspotted wings and, when at rest, its body is parallel to the object on 

 which it has alighted (Fig. 325). 



A number of other species not concerned in carrying disease are 

 'also liable to be pests. Near salt marshes of the eastern and southern 



^sifc 



Fig. 323. Fig. 324. 



Fig. 323. — Male House Mosquito {Culex pipiens L.), greatly enlarged. Note the 

 large feathery autennaj of this sex. (From U. S. D. A. Div. Ent. Bull. 25, u. s.) 



P'iG. 324. — Larva of House Mosquito, greatly enlarged. {After Howard, Dyar and 

 Knab.) 



Fig. 325. — Alighting position.s of Anopheles (left) and Culcx (right) Mosciuitues. (Frum 

 U. S. D. A. Div. Ent. Bull. 25, n. >>.) 



United States, the Salt Marsh Mosquito (Aedes sollicitans Walk.) is 

 very troublesome, and this species may fly quite a long distance inland. 

 In the West, other species are abundant. 



The Malarial Mosquitoes {Anopheles quadrimaculatus Say and 

 others). — The species of Anopheles are carriers of malaria. The adults 

 (Fig. 326) are larger than those of the House Mosquito and their wings 



