50 MISC. PUBLICATION 336, U. S. DEPT. OF AGRICULTURE 



swales and depressions in other parts of Florida. During 1936, when 

 conditions were not generally favorable for the production of Aedes 

 taeniorhynchus, Psorophora columbiae was the predominant species 

 along both the east and west coasts in the southern half of the State. 



The writers have observed the species in fairly large numbers in 

 Louisiana, but it was seldom annoying there. Thibault (lib) re- 

 ported it as being annoying near its breeding places and troublesome 

 to livestock in Arkansas. Horsfall (62, 63) found it developing in 

 large numbers in rice fields in the same State. 



Psorophora columbiae adults are fairly large and dark, with the 

 proboscis and tarsi conspicuously banded. The thorax and legs are 

 speckled with white, and the femora have a narrow white ring near 

 the apex. The abdomen has diffuse pale scaling, which tends to con- 

 centrate on the middle and posterior parts of the segments. 



PSOROPHORA CILIATA (F.) 

 (Syn., P. ctites Dyar ; the shaggy -legged gallinipper) 



This is a very large, yellowish-black mosquito with heavily scaled 

 legs and a median longitudinal stripe of yellow scales on the meso- 

 notum (figs. 2, B, and 12, H) . It breeds in temporary rain pools, and 

 its larvae feed on those of other mosquitoes, especially Psorophora co- 

 lumbiae. It is a severe biter, is widely distributed in the South and 

 East, and at times becomes fairly abundant. Notes on the breeding 

 habits of this and the following species were published by Morgan 

 and Dupree in 1903 (104). 



PSOROPHORA HOWARDII (Coq.) 

 (Howard's gallinipper) 



This large, bluish-black mosquito is commonly associated with 

 Psorophora ciliata in the Southeastern States, but is usually less 

 abundant. Its habits are similar to those of ciliata, and the larvae 

 feed on those of other species or on each other. They have also been 

 observed devouring small pollywogs. Dyar (Ifi) recorded P. howardii 

 from five of the Southeastern States, and it has since been reported 

 from Georgia (109) and Louisiana (12). The writers have collected 

 specimens in Louisiana and Florida. 



PSOROPHORA FEROX (Humb.) 



(Syn., Janthinosoma sayi D. and K., Culex posticatus Wied., C. musicus Say, etc. ; 

 the white-footed woods mosquito) 



The white-footed woods mosquito is encountered frequently in for- 

 ests and shady spots throughout the South and East and is a severe 

 biter. The last two segments of the hind tarsi are white; the other 

 tarsal segments and the proboscis are uniformly dark. The waving 

 white tips of the hind feet make it easily recognized in the field even 

 while on the wing. The larvae breed in temporary rain pools. They, 

 too, are easily recognized (except from Psorophora varipes) by the 

 unusual length of the antennae. The first notes on the life history of 

 this species were published by Morgan in 1902 (103). 



PSOROPHORA VARIPES (Coq.) 

 (Syn., P. discrucians H., D., and K. (not Walk.), in part) 



This mosquito breeds in temporary rain pools and is a severe biter. 

 The writers have collection records from McDavid, Ochlochonee, and 



