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



This species is unusually black, with few markings. The palpi are 

 faintly spotted with white scales or entirely dark. The dark spots 

 on the wings are inconspicuous or lacking (pi. 5, F), and the legs 

 are without distinct white knee spots at the tips of the femora, which 

 are usually visible in walkeri and quadrimaculatus . Examination for 

 the knee spots is best made against a dark background, the specimen 

 being viewed in different positions. Light reflections from the 

 bristles or scales should not be confused with pale scaling. 



ANOPHELES WALKERI Theob. 



This usually rare species breeds in fresh- water marshes containing 

 aquatic vegetation. It has been taken in light traps in fairly large 

 numbers at Zellwood, in the vicinity of Lake Apopka, Orange County, 

 Fla., (31) and at Reelfoot Lake, Tenn. (70). Females, taken while 

 biting, and larvae have been collected in several places in Orange 

 County, Fla., including Orlando, and adults have also been obtained 

 in small numbers from light-trap collections on both the east and west 

 coasts. A few larval specimens were sent the writers from Sumter 

 County, Ga., in 1937 by R. E. Bellamy. The species has previously 

 been recorded in the South from Crowley, La., (8, 84) and Scott and 

 Little Rock, Ark. (68, Ilk). The specimens listed by Dyar (40) 

 from Terrebonne, La., were probably Anopheles atropos. 



A study of the Florida specimens has shown some distinct differ- 

 ences in larval characters from those of specimens obtained in New 

 York State (29). Matheson and Hurlbut (94) have since reported 

 that both forms occur in the vicinity of Ithaca, N. Y. Specimens 

 from each State have been infected experimentally with malaria 

 parasites (81, 93) but are not known to be transmitters under natural 

 conditions. 



The females of this species from Florida are very dark. They 

 usually have narrow but distinct white rings on the palpi and white 

 knee spots at the tips of the femora. The wing spots (pi. 5, E) 

 are less pronounced than in quadrimaculatus. 



ANOPHELES BARBERI Coq. 



The larvae of this mosquito are found principally in tree holes. 

 It is a small species and is rarely encountered. It has been proved 

 susceptible to infection with malaria parasites, but is_ of doubtful 

 importance in malaria transmission (113). The species has been 

 recorded from various places throughout the South and East. The 

 writers have taken it in tree holes, and also on one occasion in wooden 

 tubs, at Mound, La. P. T. Riherd has sent the writers a larval 

 specimen from Gainesville, Fla. (1937), and M. F. Boyd (personal 

 communication) has taken it in the vicinity of Tallahassee, Fla. 

 Shields and Miles (111) record it from Colbert County, Ala., and the 

 writers have specimens taken in the same locality. The wing of the 

 adult is shown in plate 5, H. 



ANOPHELES ALBIMANUS Wied. 



(Syn., A. albipes Theob.) 



This species is the only anopheline included here in which the tarsi 

 are white-banded. It is a tropical species, of much importance as a 

 vector of malaria in tropical America. It was introduced into Key 



