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



123 



single stout dorso-Iateral hair, and a multiple subventral tuft arising before the 

 heavily sclerotized portion; pecten absent. Dorsal plate about three times as 

 long as broad and completely ringing the anal segment; lateral hair multiple, 

 inserted well before the posterior margin of the dorsal plate; dorsal brush con- 

 sisting of a long multiple lower caudal tuft and a moderately long multiple 

 upper caudal tuft on either side; ventral brush well developed, with about four 

 small precratal tufts piercing the dorsal plate; gills 4, shorter than the segment, 

 bluntly pointed. 



DISTRIBUTION. — Recorded from the West Indies, Florida and northern 

 South America (135). As pointed out by Pratt (135), many of the records 

 of M. titillans in the literature for the United States may b; based on M. in- 

 dubitans. Definite locality records for this species in Florida are given by 

 Chamberlain and Duffey (38). 



BIONOMICS. — The females are probably as troublesome biters as M. titillans 

 in regions where they are numerous. Adults are frequently taken in light trap 

 collections. The larva and pupae attach themselves to the roots of water lettuce 

 (Pistia) from which they obtain their air supply. 



Fig. 62. Larva of Mansonia indubilans Dyar and Shannon. A, Comb 

 scale. B, Terminal segments. C, Head. 



