336 A Monograph of Culicidae. 



Ungues of fore and mid legs are uniserrate, of the hind 

 simple. 



Length. — $ , 7 mm. ; <J , 6 • 5 to 7 mm. 



Habitat. — Boston Harbour, Massachusetts ; Fort McHenry, 

 Maryland • Maine ; New York Harbour ; Fort Harrison, Mon- 

 tana ; New Jersey (Mr. Coquillett, Miss Ludlow, Prof. J. B. 

 Smith, and Prof. E. P. Felt) ; Connecticut (H. L. Viereck). 



Observations on habits and life-history, etc. — The habits of the 

 adult and larval characters are mainly taken from the writings 

 of Prof. J. B. Smith and Prof. E. P. Felt, who have so kindly 

 helped me with specimens. 



This distinct species was not recognised by American observers 

 until 1903, but seems to have been confused with Culicada 

 cantans, Meigen, and Culex sylvestris, Theobald. 



Smith showed that it was a distinct species, and then 

 Coquillett described it. 



Smith observed larvae as early as March 23rd, and adults 

 began to issue in the early days of April, but it was not until 

 the end of the month and early May that the bulk appeared and 

 migration was in full force. 



Both sexes fly together for some distance. The $ 's are seen 

 for a day or two only, but they arrive with the J 's, and can stand 

 a flight of several miles. They seem in New Jersey to be mainly 

 marsh and littoral breeders. 



They enter houses freely when kept open, and are attracted 

 by light and the human odour. They are most persistent biters. 

 The bite is more lasting in effects than that of G. sollicitans. 

 Although essentially an evening mosquito, it will bite readily 

 during the day when opportunity offers, like the European and 

 American C. cantans of Meigen. 



The larva varies from 7-9 mm. in length, and is yellowish 

 grey in colour when mature, almost white when young ; the head 

 being paler than the rest of the body, spotting on head very 

 distinctive ; antennae short, with a single, very perceptible 

 curve, dark brown, paler at the base, sparsely set with short 

 stout spines, a lateral tuft of 8 to 10 hairs a little below the 

 middle ; at the apex a long and short spine, two bristles and 

 a very small segment; labial plate with 9-10 teeth on each side 

 of the apex. Scales on eighth segment 30-40, of form shown in 

 figure; pecten of siphon with barbed spines, 16 to 22 in each 

 row ; anal gills vary in length, being short to long, usually 

 the latter. 



