4 INSECUTOR INSCITI.^ MENSTRUUS 



Culex abserratus Felt & Young, Science, n. s., xx, 312, 1904. 

 Culicelsa auroides Felt, Bull. 79, N. Y. Sta. Mus., 448, 1905. 

 A'edes centrotus Howard, Dyar & Knab, Mosq. No. & Cent. Am. 

 & W. I., iv, 747, 1917. 



Mr. F. W. Edwards, of the British Museum, after com- 

 paring Walker's types with Canadian specimens, remarks : 

 "C. implacabilis Walk, is almost certainly the same as A. 

 punctor as identified by you. C. provocans Walk, is quite 

 unrecognizable, but might be punctor." I include the synonymy 

 as indicated. 



A. punctor extends throughout the Canadian region, reach- 

 ing the Yukon Valley. It is, however, not the dominant species 

 in the west, being replaced in that respect by lazarensis. In 

 the Coastal Region it gives rise to derivative species, which 

 are discussed under that heading. 



The coloration possesses the usual variability. The meso- 

 notum may be yellow or gray or wholly suffused with dark 

 brown ; the median band may be distinct or diffused and di- 

 vided. The dark abserratus form is comparatively rare, and 

 not usual as in the east. There is no difference in specimens 

 taken in the Yukon watershed. 



In the Skeena Valley the species breeds in the early snow- 

 pools, but not in the late flood-pools. Adults flying in August 

 there were very old and worn while lazarensis, diantaeus and 

 others from the flood-pools were still fresh. 



Total, 808 specimens: Edmonton, Alberta, May 4, 14, 1919; 

 Prince George, British Columbia, May 12, 13, 14, 16, 17, 18, 

 20, 22, 24, 25, 26, 27, 1919 ; Hazelton, British Columbia, Sep- 

 tember 6, 1919; Terrace, British Columbia, August 12, 13, 14, 

 1919 ; Kwinitsa, British Columbia, May 22, 23, 24, 25, 28, 29, 

 June 1, 2, 6, 7, 1919 ; Skagway, Alaska, June 26, 29, July 1, 31, 

 1919 ; Atlin, British Columbia, July 22, 23, 24, 1919 ; Carcross, 

 Yukon Territory, July 21, 27, 1919; White Horse, Yukon Ter- 

 ritory, June 26-30, July 1-5, 16, 17, 1919; Tahkeena River, 

 Yukon Territory, July 19, 1919 ; Byer's Camp, Yukon Terri- 

 tory, July 6, 1919; Carmack's, Yukon Territory, July 14, 1919; 

 Selkirk, Yukon Territory, July 13, 1919; Horse Falls, Yukon 



