Carpenter et al.: Mosquitoes of Southern U. S. 55 



(5-7) large, plumose; sutural (8) and trans-sutural (9) single or 2- to 

 3-branched beyond base. Antenna sparsely spinose; terrninal hair (10) with 

 several branches, longer than the sabres; antennal tuft (11) inserted on 

 basal third of shaft, several-branched, reaching near middle. Thorax: Pro- 

 thoracic dorsal submedian group (1-3) with hairs 1 and 3 short, simple, 

 hair 2 larger, variable (with two to many branches). Prothoracic pleural 

 group (9-12) of four hairs; hairs 9, 10, and 12 long, simple; hair 11 about 

 one-fourth as long as 9, 10 or 12, simple or bifid. Mesothoracic pleura! group 

 (9-12) of four hairs; hairs 9 and 10 long, simple, subequal; hair 11 manute, 

 simple; hair 12 simple, short (much longer than hair 11); metathoracic 

 pleural group (9-12) of four hairs; hairs 9 and 10 long, simple, subequal; 

 hair 11 minute, simple; hair 12 is 2- to 3-branched, short (much longer than 

 hair 11); metathoracic palmate hair (1) small, with transparent leaflets. 

 Abdomen: Submedian dorsal hair (0) obsolete; palmate hair (1) rudimentary 

 on segments I and II, partially developed on segment III and well-developed 

 on segments IV to VII; individual leaflets with serrations beyond middle. 

 Antepalmate hair (2) long, single (rarely bifid) on segments IV and V. 

 Upper lateral hair (6) on segments I to III long, plumose. Pecten as 

 illustrated. 



distribution. — Cuba (36); Atlantic and Gulf coastal regions of the 

 United States from New Jersey to Texas. Southern States: Alabama and 

 Florida (94); Georgia (125); Louisiana and Mississippi (94); North Caro- 

 lina (166); South Carolina (94); Virginia (49). Other States: Marvland 

 (19); New Jersey (77); Texas (108). 



bionomics. — The adults may be found in considerable numbers in salt- 

 marshes near their breeding places where they occasionally attack men either 

 during day or night. They rarely enter human habitations. Anopheles atropos 

 breeds in permanent salt pools or in marshes where the salt content varies from 

 approximately 1 to 12 per cent. 



jMEDICAL importance. — Mayne and Griflitts (120) were able to infect 

 approximately 85 per cent of the specimens of A. atropos which had fed 

 on suitable carriers of Plasmodium vivax. There are no data available on the 

 infection rate of this species in nature. However, it is regarded as epidemio- 

 logically unimportant, since its distribution is restricted to salt-marshes. 



Anopheles (Anopheles) barberi Coquillett 



Anopheles barheri Coquillett, 1903, Can. Ent., 35:310. 



adult female. — Small species. Head: Proboscis long, dark; palpi about 

 as long as proboscis, dark. Occiput clothed with numerous erect forked scales, 

 the ones on the central portion and vertex pale. Thorax: Integument of 

 scutum brown, shiny, clothed with long dark setae, at least half as long as 

 width of scutum. Abdomen: Integument brown, clothed with dark-brown 

 hairs. Legs: Legs entirely dark. Wings: Scales slightly broadened, uniformly 

 dark. Halter: Knob of halter dark-scaled. 



adult male. — Coloration similar to that of female. TERMINALia (Fig. 

 26). — Ninth tergite (IX-T) moderately sclerotized laterally, membranous 



