Lepidoptera 31 i 
FAMILY ARCTIIDAE. 
Genus Lexis Wallgr. 
Lexis bicolor Grt. 
Lithosia hicolor Grt.: Proc. Ent. Soc. Phil., Ill, 74, 1864. 
In the Canadian National collection there is one specimen of this widely- 
distributed species from Sixtymile river, along 141st meridian river, Yukon 
Territory, 1907 (Thos. P. Reilly). 
Genus Hyphoraia Hbn. 
Hyphoraia parthenos Harr. 
Arctia parthenos Harr.: Agassiz's Lake Sup., 309, 1850. 
One specimen in the Canadian National collection from the following 
Yukon locality: Stewart river, above Frazer falls, June 15, 1905 (J. Keele). 
Hyphoraia alpina Quens. 
Bomhyx alpina Quens.: Acerbi's Travels N. Cape, II, p. 253, pi. 1, f. 4 
(1802). 
Four specimens reared from larvae or cocoons collected at Collinson point, 
Alaska, emerged July 27, August 3, 14, September 2, 1914, 3 males and 1 female 
(F. Johansen). One of the males is shown on PI. V, fig. 18. 
All of the specimens are in general similar in appearance and resemble 
fairly closely Seitz's figure of alpina Quens. ( = thulea Dalm.)^ In these specimens 
however, the pale coloured spots on the wings in both sexes are decidedly yellowish 
almost a cream-buff^, not whitish as in the figure referred to above. Hampson^ 
also refers to the spots as being white in the female. The male antennae in 
this species are serrate differing from the antennae of the foregoing species 
which are pectinate. 
The larvae and cocoons were collected on the tundra, by Mr. Johansen, 
in the months of May, June, and July. They emerged on the dates mentioned 
above. (Breeding record 33.) 
The following brief description of the larva has been made from a cast 
skin removed from a cocoon: 
Head 3 mm. wide, rounded, somewhat quadrate, black, polished, setae 
black; mouth parts reddish. Body blackish, tubercles large and conspicuous, 
each bearing a bunch of rather long stout hairs, slightly spinulose. The hairs 
on the dorsum and upper lateral area are yellow and brown intermixed, those 
along the lower lateral area being of a darker brown shade. Thoracic feet 
black, reddish at ends; prolegs concolorous with venter. 
The cocoon, figured on PI. Ill, fig. 8, varies in size from 16-20 mm. in 
width to about 36 mm. in length. It is rather thin, the pupa inside being 
readily observable. In colour it is yellowish-white. 
Pupa. — Length 19 mm., width at widest part 7 mm.; black, polished, 
anterior half of abdominal segments slightly pitted and with short seta\ posterior 
half smooth. Wing-cases and thorax slightly wrinkled. Cremaster roughened, 
reddish, shaped as shown on PI. Ill, fig. 10, and bearing a conspicuous bunch 
of long, rather slender, dark reddish or blackish bristles slightly curved at ends. 
In addition to the above specimen, Mr. Johansen collected a cocoon of 
what I take to be of this species, on Herschel island, Yukon Territory, end of 
July, 1916. It was parasitized by Amblyteles species* which emerged on August 
8, 1916. 
1 Macrolep. World, Div. 1, Palaearct'ca, Vol. 2, pi. 17c. 
- Ridgwav's Color Standards and Nomenclature, 1912. 
3 Cat. Lep. Phalffinse in B.M., III, 223. 
' Det. by C. T. Brues. 
