78 Transactions of the Royal Canadian Institute 



Two subgenera may be recognized on the characters of the male 

 genitalia, as follows: 

 I, Unci divided into two outwardly directed plates, 



Subgenus Culicella Felt 



Un^i undivided Subgenus Culiseta Felt 



This genus has been called Theobaldia by EiUglish writers; but as 

 there already exists a genus Theobaldius, it seems inadvisable to use 

 the former, differing as it does only by a gender termination. We there- 

 fore have recourse to Culiseta, the next name in time of priority. 



Key to the Canadian species of Culiseta. 



Tarsi with faint whitish rings at both ends of the joints; wings narrow 



as in Cnlex dyari Coquillett 



Tarsal rings if present basal ; wings broader 2 



Tarsi with broad white rings at the bases of some of the joints; wings 



spotted alaskaensis Ludlow 



Tarsi with very narrow white rings ; wings spotted . . incidens Thomson 



Tarsi without white rings; wiri;gs unspotted 3 



W/ing-scales narrow, hair-like; no scales on the cross-veins, 



impatiens Walker 

 Wing-scales broader; scales sometimes present on the cross-veins, 



inornatus Williston 



Culiseta (Culicella) dyari Coquillett. 



Culex dyari Coquillett, Journ. N.Y. Ent. Soc, x, 192, 1902. 

 Culex hrittoni Felt, Ent. News, xvi, 79, 1905. 



A rather large dark brown mosquito. Mesonotum with two bare 

 impressed light brown lines, the vestiture sparse, forming frosted lines, 

 mixed with setae. Abdomen with rather broad whitish bands at the 

 bases of the segments. Legs dark brown, with obscure, narrow pale 

 rings, involving both ends of the tarsal joints; venter pale sordid, with 

 dark bands at the apices of the segments. Proboscis entirely blackish. ^ 



The male genitalia have the unci divided into two plates. ,r.<j, 



The larvae are found in spring in cold bogs, apparently developing 

 from overwintering eggs, but nothing certain is kniown about the habits 

 of the species. No observations of its biting are on record. The males 

 are attracted rather freely to light. 



Distribution: Northern forests, in cold bogs southward to New 

 Jersey. 



