MOSQUITO BIOLOGY 109 



Aedes canadensis Theobald 

 The Woodland Pool Mosquito 



DISTRIBUTION AND CHARACTERIZATION 



[North America east of the plains and westward in Canada to the 

 Rocky Mountains. Trapped 1,173 females in New Jersey.] 



Distinctive characters of this species white-banded tarsi, last joints 

 of hind pair being entirely white and joints white at both base and tip ; 

 black, unhanded beak ; brown, unhanded thorax ; unspotted wings and 

 medium or rather large size. This combination of characters holds 

 equally for both sexes and separates canadensis from all other New 

 Jersey mosquitoes. 



DESCRIPTION OF THE ADULT 



Medium sized, not very robust in appearance. Body, exclusive of 

 beak, about 6 mm., or one-quarter inch long; beak about one-third 

 length of body and wings expand 10 mm., or about three-eighths inch. 

 Head brown, largely taken up by black eyes ; beak black or blackish, 

 without marks or rings; palpi in female short, blackish, four- jointed, 

 set with rather stout and moderately long hair, terminal joint very 

 small, yet not retracted nor shrunken. In male palpi as long as beak, 

 black, basal joint with two white bands, second and third joint also in- 

 completely banded at base. Toward tip palpi have dense, fan-shaped 

 tufts of hair inwardly. 



Antennae of male plumose, silky brown, not much more than half as 

 long as palpi, terminal two joints long and slender, central and basal 

 joints cup-shaped with circle of very long silky hair. In female antennae 

 longer, much more slender, individual joints set with both shorter and 

 longer stiff hair and with circle of long, moderately stout hair at base 

 of each joint. 



Thorax evenly brown without obvious lines or spiny clothing. Legs 

 black or blackish, femora yellowish on inside, white dot at knee. Tibiae 

 set with small spines and some longer whitish hair, white at tips. All 

 tarsi white-ringed, base and tip of each joint being white. In anterior 

 tarsi only one well marked ring in female, others being much reduced, 

 in male all rings almost obsolete. Middle tarsi have all rings obvious, but 

 much reduced toward tip. Posterior tarsi have all joints white-ringed, 

 and last joint entirely white. In male claw- joint of anterior tarsi in- 

 ward excavated and set with spurs and spines, inner claw larger, with 

 acute tooth at base and another near middle, outer claw smaller and 



