STRUCTURE, CLASSIFICATION, AND KEYS 



across the dorsal aspect of the abdomen almost divided at the 

 center: The Swamp Mosquito; A'edes vexans Meig. (was syl- 

 vestris Theob.) 



(5) A good sized brown species with the banding yellowish 

 rather than white; bands running transversely across dorsal 

 aspect of abdomen, only a little, or not at all, notched at middle, 

 claws of hind tarsi without tooth: The Brown Salt Marsh Mos- 

 quito; A'edes cantator Coq. 



(6) Very much like A'edes cantator; bands of abdomen and feet 

 broader and somewhat lighter in color; one tooth on each claw 

 of hind tarsi (see Fig. II): The Brown Woods Mosquito; 

 A'edes stimulans Walk. 



17 



A B 



Fig. II. A shows hind tarsi of A'edes stimulans and B shows hind tarsi of 

 A'edes cantator. 



lib 



lie 



12a 



Segments of the hind tarsi, at least, white-banded or ringed at 

 both base and tip ; terminal segment of hind tarsi usually entirely 

 white : 



(1) A good sized brown species; thorax without lines or marks; 

 bands on tarsal segments broad: The Woodland Pool Mosquito; 

 A'edes canadensis Theob. 



(2) A small blackish species; tip of thorax covered with gray 

 hairs ; dark line down center of dorsal aspect of the thorax ; 

 bands on tarsi narrow and white: The Rock-Pool Mosquito; 

 A'edes atropalpus Coq. 



(3) Medium sized species; easily recognized by the peculiar 

 golden streaked appearance of thorax: Dyar's Mosquito, Theo- 

 baldia morsitans Coq. 



Only the last tarsal segments of the hind legs white; a medium 

 sized species, black with deep purple reflections : The Big Woods 

 Mosquito; Psorophora ferox Humb. 



Thorax marked in some way with stripes or spots, or the sides 

 white or golden brown: 



13 



