18 INSECUTOR INSCITI^ MENSTRUUS 



Males were seen swarming at Kenora, Ontario. They ap- 

 peared after sunset when it was becoming distinctly dark. 

 They were seen on the top of a hill, flying before pine trees, 

 being associated although not mixed with a swarm of Man- 

 sonia perturbans Walk. 



The larva has the head hairs single ; comb-scales numerous 

 with feathered tips ; pecten of the air tube uniform ; anal seg- 

 ment with strongly chitinized plate, emarginate on the side. 



Seven hundred and ninety specimens were taken as follows : 

 White River, Ontario, June 13-35, 1918; Nipigon, Ontario, 

 June 26, 1918; Kenora, Ontario, July 2, 1918; Dryden, On- 

 tario, July 1-2, 1918; Red Deer, Alberta, July 30-August 3, 

 1918 ; Lochearn, Alberta, August 5-7, 1918 ; Lamoral, Alberta. 

 August 6, 1918 ; Banff, Alberta, July 8-25, 1918 ; Laggan, Al- 

 berta, July 11, 1918. 



Besides the localities cited in the monograph (Field, B. C. 

 being incorrect), I have specimens from White Mountains, 

 New Hampshire (H. K. Morrison) ; Saxeville, Wisconsin (B. 

 K. Miller). See also my remarks under intrudens for locality 

 Ottawa, Ontario, and pullatus for locality Kaslo, British Co- 

 lumbia. Mr. H. N. Awrey collected specimens at Height of 

 Land, Osnaburg, Fort Hope and Ghost River, Ontario, in 

 June and July, 1918. 



Doubtful specimens before me, which may be this with nar- 

 row lines, or the form of punctor with median stripe divided, 

 Kenogami River, Ontario, June 30, 1903 (W. J. Wilson) ; 

 Nagagami River, Ontario, 20th portage, June 14, 1903 (W. J. 

 Wilson) ; Nagagami River, Ontario, June 19, 1903 (iW. J. Wil- 

 son). The mesonotal lines in these are narrow and light, in 

 one blurred together, and I think they are forms of punctor. 

 The continuation of this line of variation gives the mesonotum 

 entirely golden yellow. I have taken this form rarely, about 

 one in a thousand, but none of my bred material developed 

 into it, so T do not know certainly whether it is a variety of 

 lazarensis or of punctor. 



