INSECUTOR INSCITI^ MENSTRUUS 73 



Besides this structural difference, the habits of the European 

 species as described by Lang are quite at variance with those 

 of punctor in America. I am therefore of opinion that punctor 

 and nemorosus Auct. are distinct species. 



Typical genitalic mounts are before me from Mount Tom, 

 Massachusetts, May 6, 1903 (F. Knab) ; Plattsburgh, New 

 York, April, 1905 (H. G. Dyar) ; Dublin, New Hampshire, 

 May, 1909 (A. Busck) ; Saxeville, Wisconsin, May 23, 1909 

 (B. K. Miller) ; White River, Ontario, April, 1918 (H. G. 

 Dyar) ; Prince Albert and Beaver Creek, Saskatchewan, June, 



1918 (A. E. Cameron) ; Agassiz, British Columbia, April 24, 



1919 (E. Hearle) ; Prince George, British Columbia, May 14, 

 1919 (H. G. Dyar) ; Kwinitsa, British Columbia, May-June, 

 1919 (H. G. Dyar) ; White Horse, Yukon Territory, July 2, 

 1919 (H. G. Dyar). 



Species 3 



Aedes (Ochlerotatus) aboriginis Dyar. 



Aedes aboriginis Dyar, Ins. Ins. Mens., v, 99, 1917. 

 Aedes aboriginis Dyar, Ins. Ins. Mens., vi, 78, 1918. 

 Aedes aboriginis Dyar, Ins. Ins. Mens., viii, 25, 1920. 



The spine on the basal lobe of the male hypopygium is still 

 more slender than in punctor; the basal lobe itself is smaller 

 and more distant from the apical lobe (PI. I, fig. 4). The 

 differences are, however, slight, and taken alone might be 

 doubtful ; but the larva differs in having the anal segment not 

 ringed, the plate being divided on the ventral line. This is a 

 large species, like punctor, inhabiting the moist northwest Pa- 

 cific coast from Washington to Alaska. The larvae frequent 

 open, often dirty pools, frequently occurring in ditches and 

 other artificial water. 



Species 4 



Aedes (Ochlerotatus) hexodontus Dyar. 



Aedes hexodontus Dyar, Ins. Ins. Mens., iv, 83, 1916. 

 Aedes hexodontus Dyar, Ins. Ins. Mens., v, 13, 1917. 

 Aedes hexodontus Howard, Dyar & Knab, Mosq. No. & Cent. 



Am. & W. I., iv, 1041, 1917. 

 Aedes hexodontus Dyar, Ins. Ins. Mens., vi, 78, 1918. 



