Genus Culicada. 341 



Culicada canadensis. Theobald (1901). 

 Culex canadensis. Theobald (1901). 



Mono. Culicid. II., p. 3 (1901), Theobald; Bull. 79, Ent. 22, p. 303, N. Y. 

 St. Mus. (1904), Felt ; Mosq. N. Jersey, p. 265 (1904), Smith. 



Numerous notes have been made on this species by American 

 observers. 



Additional localities. — Albany and Poughkeepsie, New York 

 State (E. P. Felt) ; New Jersey (J. B. Smith) j Canton Harbour, 

 New Hampshire and British Columbia (Dr. Dyar) ; Fort Logan, 

 Arkansas ; Fort Snelling, Minnesota ; Fort McKinley, Montana ; 

 Westlawn, Cem. Okla (Miss Ludlow) ; Connecticut (H. L. 

 Viereck). 



Larva of Culex canadensis. Theob. 



Length 7-8 mm. ; dirty slate colour, head black. Up to time 

 when two-thirds grown there is usually a pale band or neck 

 giving a very characteristic appearance. Antenna slender, short, 

 pale brown, with short stout spines and with more numerous 

 very small ones; lateral tuft of 6 to 10 hairs situated well 

 below middle ; apex with a long and short spine, two bristles 

 and a small joint; mentum triangular with 12 to 14 teeth on 

 each side of apex. Comb of eighth segment of 25 to 50 

 elongated fringed scales, 40 being the average arranged as shown 

 in Smith's figure. Pecten of siphon with two series of toothed 

 spines ranging from 16 to 24, 18 being the average; anal gills 

 moderately long. 



Observations. — Culex canadensis is the earliest and latest of 

 the species that winter in the egg stage, earliest as both larvae 

 and adults, latest as to larvae only. The latter do not seem to be 

 affected bv cold, for Professor J. B. Smith records their being 

 found in February in pools covered with ice, and water tem- 

 perature of 36° F. The same observer found the ova in bottom 

 mud from various pools. 



The adults appear in April and are found as late as September 

 in New Jersey. Professor E. P. Felt says they appear in early 

 May about Albany. The eggs are black, spindle-shaped and 

 smooth. They may be laid on the water and then sink to the 

 bottom, or they may be laid on mud. 



Dyar states that the eggs are laid singly, non-adherent, 

 fusiform, with ends rounded, black. According to Felt (p. 304) 

 the larvae seem to hibernate in New York State, for he found 

 them of large size when they first appear in the spring. 



