THE CANADIAN ENTOMOLOGIST 65 



Red Deer River, (1); High River Baird, (1). Manitoba: Miniota, 

 Dennis, (1). B. C: Kaslo, Cockle, (1). 



Type — 9 , High River, Alta., Mr. Thomas Baird. This is the 

 darkest and most even of all the specimens, and very closely 

 resembles Holland's plate XXHI, fig. 6, which is unquestionably 

 this form, is probably a 9 , and may be of a Calgary specimen. I 

 consider this the more probable, as I sent Dr. Holland a number of 

 Calgary specimens for figuring in that work, including the present 

 form under the name " titubatis'' on the authority of Smith. It 

 IS the No. 224 of my Alberta List, under the name " punctigera," 

 on Smith's later authority (Can. Ent., XXXVH, 54, Feb., 1905). 

 The form "has no dead black markings whatsoever, and the general 

 colour is very even. There is no darker basal streak, no indication 

 of darker filling either in the discoidal spots or cell, except occasion- 

 ally the slight inferior darkening of the reniform, no black dashes 

 preceding the subterminal line, and the terminal space is usually 

 of exactly the same colour as the rest of the ground, or barely 

 perceptibly darker. As a rule, the only real contrast is the reni- 

 form. The form is the one predominating at Calgary, ver>' few 

 years having passed when I have not taken at light or treacle at 

 least a few specimens, and always females. • Moreover, I have 

 very rarely taken any other forms here, and great was my surprise 

 when I finally traced their connection with some other forms b}' means 

 of comparison of types, and breeding, and a study of Kaslo material. 

 I have not infrequently received the form from Manitoba and 

 Saskatchewan. It occurs also at Banff, and I am under the im- 

 pression that I have seen it from Vancouver Island. A few speci- 

 mens were included in the material referred to as " picnctigera" in 

 the Kootenai List, though the bulk of the specimens were perfusca 

 Grt. (cocklei Sm.),* occasional forms of which are certainly not 

 unlike it. One of my Calgary females of perfida was taken b>- me 

 in 1894 in cop. with a small dark red male, unfortunately rather 

 worn, but practically indistinguishable from a small even red 

 odirogaster. For the next twenty years I never took a male at all 

 like it which I did not feel tolerably safe in associating with ochro- 

 gaster, though I saw a few similar males from Saskatchewan and 



'=Can. Ent., XLIII, 339, Oct. 1911. 



