64 
Man.; Pincher, Alta (Willing) ; Kaslo, B. C. (July 8-20) (Cockle) ; 
Oak Creek Canyon, Colo. (Doll). As before however, we have re- 
stricted the types to a single locality to avoid confusion. 
Finally we have before us 1 ¢ and 3 2 from the old Bolter Col- 
lection from New Mexico, and a @? in Coll. Barnes from Durango, 
Colo., which are deep brown in tint and apparently represent a good 
race; we await fresher material before venturing to bestow a name. 
(c) O. VAGANS WILLINGI subsp. nov. (PI. III, Fig. 8). 
$ Much deeper in coloration than the two preceding forms, of a general 
suffused blue-black appearance; t. a. line broad, waved, deep purple-brown; 
basal space dark with slight metallic green tinge; t. p. line similar in color to 
t. a. line; median space paler, especially around reniform, with or without 
greenish suffusion in lower portion; subterminal line vague, whitish, not so 
prominently angled as in type form; distinction in coloration between sub- 
terminal and terminal areas not marked; terminal line black, irregular, with 
slight inward white shading. Secondaries even smoky black with vague discal 
dot. Expanse 35 mm. 
Hasitat. Humboldt, Sask. (July 13 and 27) (Willing) 2¢. Type, Coll. 
Barnes; Cotype, Coll. Willing. 
We take much pleasure in naming this form after Prof. T. N. 
Willing who has kindly sent us specimens for study. We have 6 very 
similar ¢’s from Hymers, Ont. (Dawson) (PI. III, Fig. 9) and a 
single ¢ from Winnipeg, Man. (Coll. Winn). We have chosen the 
Saskatchewan specimens as types for the reason that we have a larva 
(Pl. V, Fig. 5) of this form before us from the same region which 
we describe as follows: 
Head black; body marbled laterally with whitish; dorsal tufts on seg- 
ments 4-7 mouse gray with a slight admixture of white laterally; tuft on seg- 
ment II black, edged by the white plumed hairs proceeding from tubercle III; 
black anterior and posterior lateral hair pencils; remainder of body clothing 
consisting of plumed whitish hairs admixed with white bristles from tubercles 
II and III; tubercle IV (subspiracular) bears a single black central plumed 
hair (on segment IV, 2 black hairs); spiracles ochreous rimmed with black; 
eversible glands coral red.” Length (blown) 38 mm. 
This larva only differs from that described under the type form 
in the more even mouse-gray color of tufts and the fact that the lateral 
tubercles bear fewer black plumed hairs; the number is apparently 
constant, as several minature larvae from the same source agree in this 
respect with the full grown specimen. The food plant is poplar. 
