J 



22 INSECUTOR INSCITI^ MENSTRUUS 



which I have returned to Ottawa, seems to be this, as well as 

 the damaged condition allows me to judge. 



Aedes prodotes Dyar. 



A'cdcs trichurus Howard, Dyar & Knab (in part, not Dyar), 



Monog., iv, 762, 1917. 

 A'cdcs prodotes Dyar, Ins. Ins. Menstr., v. 118, 1917. 



This is the Rocky Mountain form of dedicus, differing 

 slightly in the male genitalia. The basal lobe of the side piece 

 has the setse that are adjacent to the spine nearly as long as it. 

 whereas in decticus they are distinctly shorter. Some of the 

 adults resemble decticus closely in coloration, but most are 

 browner, suffused, the two black lines lost and often only dis- 

 tinguishable from intrudens by the grayer scales over the ante- 

 pcutellar space. The larva is unknown. 



Two females recorded from Banff in the monograph under 

 trichurus are this species. 



The males were seen swarming at Banff. On the summit of 

 a hill on the Tunnel Mountain Road, covered with lodgepole 

 pine and low bushes, swarms were observed low down about 

 two feet from the ground, here and there in front of the bushes. 

 This was at the usual swarming time, a quarter of an hour after 

 sunset, which, in that latitude, was a quarter of 10 p. m. Half 

 an hour later no swarms were to be found. 



The Calif ornian A. cataphylla Dyar is practically identical 

 in marking with prodotes, but I think it is not the same, on ac- 

 count of the geographic discontinuity. Male and larva of cat- 

 aphylla are unknown. 



Eight hundred and one specimens rewarded my efforts, as 

 follows : Banff, Alberta, July 7-26, 1918 ; Lake Minnewanka, 

 Alberta. July 22, 1918; Laggan, Alberta, July 11, 1918^ Lake 

 Louise, Alberta, July 11, 1918. 



At Lake Louise this was almost the only species flying, 401 

 specimens being taken in one day's collecting. Only three 

 other species occurred, of which the most numerous was taken 

 in seven examples. 



Other records are: Bozeman, Montana (cotype of pro- 



