THE MOSQUITOES OF THE SOUTHEASTERN STATES 



29 



with the classification and types of breeding places in given localities 

 are those of Bradley {23) for northeastern Louisiana, Barber and 

 Komp (6) and Perez {107) for Mississippi, Boyd {14, 15) for 

 northeastern North Carolina, Watson and Spain {120) for northern 

 Alabama, Meleney, Bishop, and Eoberts {100) for western Ten- 

 nessee, and Darling {36) 

 for Georgia (Lee Coun- 

 ty). Boyd {16) has 

 given a comprehensive 

 review of the literature 

 on the natural history 

 of anophelines as well 

 as their relation to ma- 

 laria transmission. 



All our native anoph- 

 elines are fresh-water 

 breeders, with the ex- 

 ception of Anopheles 

 atropos and one variety 

 of A. crucians, which 

 breed in brackish water. 



The eggs (fig. 3, G) 

 are laid singly — that is, 

 not stuck together in 

 rafts — and are provided 

 with floats to keep them 

 at the surface of the 

 water. Hatching usual- 

 ly occurs in 2 or 3 days, 

 and breeding is contin- 

 uous during the sum- 

 mer months. Boyd {14) 

 obtained records indi- 

 cating that A. quadri- 

 maculatus may have 10 

 generations annually in 

 the latitude of south- 

 western Georgia. In 

 the warmer sections of 

 the Gulf States breed- 

 ing is also more or less 

 continuous through the 

 winter {7, SO), although 

 much reduced in vol- 

 ume, and the rate of de- 

 velopment is slower. 

 The larvae of some 

 species are able to with- 

 stand freezing temperature {!). The adults are active chiefly after 

 dusk and spend the daytime resting in dark, humid situations. 



When alive, most anophelines can be recognized by their typical 

 resting position (fig. 9, A, B), the abdomen and proboscis being held 

 in nearly a straight line and pointed at an angle toward the resting 



Figure 9.- 



-Resting positions of mosquitoes 

 B, Anopheles ; C, Gulex. 



A and 



