98 Transactions of the Royal Canadian Institute 



Canadian Records. 

 Prince Rupert, British Columbia, May ii, 1919 (H. G. Dyar). 



Aedes (Heteronycha) aboriginis Dyar. 



Aedes aboriginis Dyar, Ins. Ins. Mens., v, 99, 19 17. 



A large blackish mosquito. Mesonotum yellow-brown, with two 

 broad central stripes, sometimes confluent, and short thick posterior 

 lateral ones. Abdomen black, with basal segmental narrow white bands; 

 venter white-scaled, with more or less distinct black ban-ds at the apices 

 of the segments. Legs black, some whitish scales intermixed; femora 

 white below. Wing-scales wholly dark. 



The markings of the mesonotum are not separable from lazaiensis. 

 The form with the mesonota'l stripes united is practically as in punctor, 

 to which this species is closely allied in the male genitalia; the larvae 

 however, are distinctive. The winter is passed in the egg state, the larvae 

 developing in early spring pools of foul character, not in typical muskeg- 

 pools. The n>ales have been observed swarming as late as 9 a.m. in 

 bright sunlight, although in deep forest and shaded by the trunks of 

 large trees. This habit is different to that of any other known Aedes. 

 The females bite by day or night, as with any other forest mosquito. 



Distribution: Pacific coast, from Washington to Alaska. 



Canadian Records. 



Royal Oak, British Columbia, May 4, 1917 (R. C. Trehearne). 

 West Holme, British Columbia, May 3, 19 17 (A. E. Cameron). 

 Prince Rupert, British Columbia, May 11, 1919 (H. G. Dyar). 



Group Impiger. 

 Aedes (Heteronycha) lazarensis Felt & Young. 



Culex lazarensis Felt & Youn,g, Science, n.s., xx, 312, 1904. 

 Culex horealis LudloW, Can. Ent., xliii, 178, 191 1. 



A rather large blackish mosquito. Mesonotum dull yellow, often a 

 little mixed with blackish; two media^n black-bro\vn lines and short 

 posterior lateral ones, usually both broad and distinct. Abdomen black, 

 with basal segmental white bands, often narrowed in the middle; venter 

 whitish-scaled, with more or less black at the apices of the segments. 

 Legs black, femora white below; knee-spots white narrowly. Wing 

 scales all black. 



The colouration of the mesonotum varies from the normal yellow to 

 gray in the Yukon valley (form horealis), and in another variety is more 

 or less overspread with brown. The lines may be narrow, or obsolete, or 



