INSECUTOR INSCITI^ MENSTRUUS 5 



This species is characteristic of the Canadian forested region; 

 being on the whole the most abundant form.. It is probably 

 not specifically separable from Aides communis DeGeer of 

 northern Europe. In the west a number of local forms may be 

 recognized as subspecies. 



Aedes lazarensis borealis Ludlow. 



Culex borealis Ludlow, Can. Ent., xliii, 178, 1911. 



Aedes borealis Howard, Dyar & Knab, Mosq. No. & Cent. Am. & 



W. I., iv, 1041, 1917. 

 Aedes lazarensis borealis Dyar, Ins. Ins. Mens., viii, 6, 1920. 

 Aedes lazarensis borealis Dyar, Ins. Ins. Mens., viii, 165, 1920. 

 Aedes lazarensis borealis Dyar, Trans. Royal Can. Inst., xiii, 



part 1, 98, 1921. 



Characterized by the extreme variability and the occurrence 

 of specimens with the mesonotum whitish instead of yellow. 

 The normal form also occurs, but rather as an aberration. I 

 observed this subspecies in the Yukon watershed from Carcross 

 to Dawson and at Skagway, Alaska. Dr. Ludlow's types came 

 from Eagle, Alaska, some miles down the Yukon below 

 Dawson. 



Aedes lazarensis altiusculus Dyar. 



Aedes altiusciilits Dyar, Ins. Ins. Mens., v, 100, 1917. 



Aedes (Ochlerotatus) allinsculus Dyar, Ins. Ins. Mens., vi, 78, 



1918. 

 Aedes (Heteronycha) altiusculus Dyar, Ins. Ins. Mens., viii, 



105, 1920. 



Found on the meadows on the lower slopes of Mount Rainier, 

 Washington. It is a diminutive form, flying with the large 

 Aedes aboriginis Dyar, a species belonging to the moist coastal 

 fauna, a very peculiar association. 



Aedes lazarensis masamae Dyar. 



Aedes (Heteronycha) masamae Dyar, Ins. Ins. Mens., viii, 166, 

 1920. 



This form inhabits the slopes of the mountains about Crater 

 Lake, Oregon. These slopes are long and gentle, and in spring 

 the retreating snow forms a definite even line. Visiting this 

 region i;i May, the snow line was about twenty miles above 



