INSECUTOR INSCITI^ MENSTRUUS 29 



Widely distributed in temperate regions in both Europe and 

 America. 



A remarkable swarm of males was witnessed at Banff. The 

 writer and a companion went down to the open field beyond 

 the boathouse after sunset. On emerging from the tall timber 

 that borders the road a swarm of males was seen overhead 

 about 10 feet from the ground. There must have been about 

 500 specimens and this cloud followed us some 200 yards into 

 the open, keeping directly overhead. A number were captured 

 in the net, and the swarm dispersed, but quickly gathered 

 again. After some 15 minutes, it having become nearly dark, 

 on another attempt to net specimens the swarm dispersed and 

 vanished completely, apparently flying back to the timber. 

 Nothing was seen of it again. 



Five hundred and sixty specimens of this species were taken, 

 as follows: Dryden, Ontario, June 27-July 2, 1918; Kenora, 

 Ontario, July 2, 1918; Winnipeg Beach, Manitoba, July 4-12, 

 1918; Saskatoon, Saskatchewan, August 10-20, 1918; Prince 

 Albert, Saskatchewan, August 14-17, 1918; Red Deer, Alberta, 

 August 1, 1918; Lochearn. Alberta, August 7, 1918; Lamoral, 

 Alberta, August 6, 1918; Calgary, Alberta, July 28, 1918; 

 Lake Minnewanka. Alberta, July 22, 1918 ; Banff, Alberta, 

 July 7-27, 1918. 



Aedes cinereus Meigen. 



.Icdes cinereus Meigen, Syst. Beschr, zweifl. Ins., i, 13, 1818. 

 Culex nigritulus Zetterstedt, Dif Scand., ix, 3459, 1850. 

 Ai'des fuscus Osten Sacken, Bull. U. S. Geog. Surv., iii, 191, 1S77. 

 Culex pallidohirta Grossbeck, Can. Ent, xxxvii, 359, 1905. 

 Culex pallidocephala Theobald, Mon. Culic, v. 612, 1910. 



This species is widespread in north temperate regions in 

 Europe and America. The usual form has the abdomen with- 

 out pale transverse bands, the lateral white spots being contin- 

 uous, forming a straight pale stripe. About half of the speci- 

 mens before me have the abdominal bands more or less dis- 

 tinct and in these the lateral spots are wedge-shaped and do 

 not reach the posterior borders of the segments, thus not form- 

 ing the characteristic lateral stripe. 



