404 . THE CANADIAN ENTOMOLOGIST 



From the fact that these female moths have such remarkably long 

 ovipositors, it would seem strange that they should deposit their 

 eggs openly, as indicated on the plate herewith. One would natur- 

 ally expect that the eggs would be laid in crevices, or other recesses. 

 Further observations on the egg-laying habits of the species are 

 most desirable. 



The captured females which we have vary in size from 11 mm. 

 in length, by 4 mm. in Avidth (at widest part) to 16 mm. in length 

 by 6 mm. in width. Scales on outer half of rudimentary wings 

 mostly reddish ochreous, remaining scales black. A sprinkling of 

 reddish-ochreous scales also occurs on sides of thorax and abdomen 

 and a conspicuous cluster on summit of head. A distinct dorsal 

 band of these scales is present on thorax and abdomen. Balance 

 of body, black, clothed with long, grey hairs. Antennae filiform, 

 black, hairy. Legs hairy, tarsal claw brown. 



Food Plants. — The larva? were fed on aspen {Popidus tremii- 

 loides) and cottonwood {Popidus deltoides). At Aweme, Man., 

 the larvie have frequently been collected by Mr. Criddle from 

 aspen and also from several species of willow; on one occasion he 

 found a larva about two-thirds grown on elm. 



Distribrdion in Canada. — In Alberta males have been col- 

 lected at Head of Pine Creek, April and early May (F. H. Wolley- 

 Dod), Millarville, May 9 (A. F. Hudson); High River, March 12 

 (T. Baird) and at Edmonton, May 12, 1896 (F. C. Clare): in Sas- 

 skatchewan; Saskatoon, April, 1913, and Regina, April 23 (T. N. 

 Willing) : in Manitoba; Rounthwaite, April 15, 25 (L. E. Marmont), 

 Aweme, April 18-27 (N. Criddle); Winnipeg, April 29 (Hanham). 



The photograph from wliich the jilate was made was taken by 

 my colleague, Mr. F. W. L. Sladen. Figs. 12 and 13 in the text 

 were drawn bv Mr. A. E. Kellet, artist assistant in the Division. 



Explanation oj' Plate XI Y. 

 Apocheima rachelcc Hulst. 

 (All figures natural size). 



1 . Egg cluster on po[:>lar. 



2. Larva, Stage IV. 



3. Larva, Stage V, mature. 



4. Pu])ce. 



