THE DIPTERA 



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 



FIG. 323. FIG. 324. 



FIG. 323. Male House Mosquito (Culex pipiens L.), greatly enlarged. Note the 

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



FIG. 324. Larva of House Mosquito, greatly enlarged. (After Howard, Dyar and 

 Knab.) 



FIG. 325. Alighting positions of Anopheles (left) arid Culex (right) Mosquitoes. 

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



(From 



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 



