402 



A Monograph of Culicidae. 



Length. — 3 • 5 to 4*5 mm. 



Habitat. — Maine, and New Hampshire, and along the Potomac 

 River, Maryland, U.S.A. (Dr. Dyar) ; Connecticut (H. L. 

 Viereck)." 



Observations. — The description is drawn up from Smith's 

 (p. 261). I am not sure where to place it as I have not seen a 

 specimen. The structure of $ palp described by, and the long 

 thin proboscis as figured by Smith seem to preclude it from 

 Culex, and also the larval characters. 



The habits of larvae, adult, etc., are partly taken from the 

 same source as the description. 



Habits of adults. — Dr. Dyar records it as very troublesome on 

 and about the River Potomac and records its biting freely. 



The larva varies from 7 to 9 mm. in length, pale greyish- white 

 in colour except head, siphon, and ninth segment, which are 



Big. 170. 

 Culcx atropalpus. Coquillett. 



a, Siphon and anal tegmenta ; b, labial plate ; c, scale of xth segment 



<1, scales of .siphon ; e, antenna (Smith). 



blackish-brown. Antennae rather short, brown, with a few 

 thorn-like spines, apex with one long and three small bristles and 

 ;i small articulated peg; lateral hair-tuft of two bristles, just 

 below the middle ; labial plate broadly triangular with 9 to 



