63 
We append a description of what we imagine to be the larva of 
this form, drawn up from the specimen already mentioned as coming 
from Mr. Gibson; we also figure it (Pl. V, Fig 6). 
“Head black; body marbled laterally with white; dorsal tufts on segments 
4-7 squarely cut, brown, intermingled with white hairs; tuft on segment II 
black, narrow, considerably raised above two white bunches of plumed hair 
supporting it on each side; two moderately long black lateral hair pencils in 
front and similar ones behind; other warts with small tufts of plumed white 
hair, those of dorsal and subdorsal row intermixed with ochreous bristles; on 
segment 4 the tubercle of the supra-spiracular row (III) bears a single black 
central plumed hair in addition to the others; the subspiracular row (IV) has 
2 or 3 plumed black central hairs to each tubercle with segment 4 bearing 5 or 6 
such hairs; spiracles pale ochreous, black rimmed; eversible glands coral red.” 
(b) O. VAGANS GRISEA subsp. nov. (PI. III, Figs. 5, 6). 
Olene plagiata Barnes & McDunnough (nec Walker) Cont. N. Hist. N. Am. 
Lep. Vol. I, No. 4, Pl. I, figs. 1 and 2 (1912) (types). 
Much grayer and without the noticeable greenish tinge characteristic of 
the type form; slight traces of olivaceous only in median space; reniform sit- 
uated on a more or less distinct white patch; gray shade preceding t. a. line 
often distinctly marked in ¢; line of demarkation between subterminal and 
terminal areas only distinct at costa as a whitish shade line; white supraanal 
spot very indistinct or missing; terminal broken black line edged inwardly with 
white. Secondaries of ¢ paler than in type form. 
Hasitat. Eureka, Utah (26-31 July) (Spalding) (104’s); Provo, Utah 
(July 9) (Spalding) 19. Types, Coll. Barnes. 
A series of 9 6’s andi @ before us from Glenwood Spgs., Colo., 
taken in July and August are slightly darker in coloration, with almost 
no white; a ¢ from Beaver City, Utah, (Pl. III, Fig. 7) received 
through Mr. Doll agrees with these Colorado specimens and through 
the kindness of the same gentleman we have had the chance of exam- 
ining two immature larvae (14 grown) from the same locality; these 
differ from the Eastern and Saskatchewan forms in having the lateral 
body-clothing white, entirely without black plumed hairs; the dorsal 
tuft on segment 11 is very black and long, giving almost the appear- 
ance of a strong hair pencil; the other dorsal tufts mouse-gray and 
squarely cut, the anterior and posterior hair pencils similar to those of 
the other subspecies. Not knowing the larvae of the Eureka, Utah 
form we can only refer this larva provisionally to grisea; they were, 
according to Mr. Doll, plentiful on oak. We have very similar ¢’s 
also from Cartwright, Man. (Heath), (Pl. III, Fig. 3) Winnipeg, 
