INSECUTOR INSCITI^ MENSTRUUS 33 



This Pacific coast species enters the Canadian region only in 

 the Rocky Mountains. Fourteen specimens were preserved: 

 Banff, Alberta, July 20-27, 1918; Lake Louise, Alberta, July 

 18-23, 1918. 



Culiseta alaskaensis Ludlow. 



Theobaldia alaskaensis Ludlow, Can. Ent., xxxviii, 326, 1906. 



This northern species enters the Canadian zone in the Rocky 

 Mountains. Nineteen specimens are at hand, all from Banff. 

 Alberta. July 7 to August 10, 1918. 



Larvae were found in a grassy pool by the railroad, separ- 

 ated by a few feet from the Echo River, the pool having evi- 

 dently been filled by flood-water. 



Head rounded, the antennae small and dark, a tuft near the 

 middle, the part beyond it tapering; head hairs multiple (7:4). 

 Lateral comb of the eighth segment of many spines in a patch, 

 the single spines with feathered tips. Air-tube about two-and- 

 a-half times as long as wide ; pecten of eight teeth with one 

 large and one small branch, followed by long hairs to the mid- 

 dle of the tube. Anal segment ringed by the plate, which is 

 perforated for the ventral tufts. 



Aedes pullatus Coquillett. 



Culex pullatus Coquillett, Proc. Ent. Soc. Wash., vi, 168, 1^04. 

 A'cdcs acrophihts Dyar, Ins. Ins. Menstr., v, 127, 1917. 



This species abounds in the higher Rockies, breeding in open 

 muddy pools about lakes and rivers. It was scarce at Banff, 

 apparently not extending out of the foot-hills. 



To my surprise, acrophilus proves to be this species. It ap- 

 pears that I had obtained a wrong impression of pullatus, 

 calling it a gray species, whereas the mesonotum is really yel- 

 low. Evidently my impression was based on some Kaslo 

 specimens which are not pullatus, but either the western form 

 of lazarcnsis or very large prodotes. These forms were not 

 recognized from Kaslo at that time (1903) ; but it is probable 

 that the Canadian fauna reaches that region in its entirety. My 

 researches last year did not cover the area, as I stopped at the 

 Continental Divide. 



