Lepidoptera 39 i 
point. This latter description is in general similar to Dyar's description of 
/I 
rossi' 
The larvse reared by Mr. Johansen were fed in captivity on mountain 
saxifraga (aS. oppositifolia L.) and willow, chiefly the latter as soon as available. 
In the Entomological Record for 1903^ the species is recorded from Black- 
falds, Alta., where in 1902 and 1903 Mr. P. B. Gregson found the larva on 
willow and poplar. Mr. Gregson at the time forwarded to us some larvse and 
from one of these a male moth was reared. Larvse were also received in 1903 
from Mr. D. Tipping, of the same place. 
Regarding the occurrence of the species at Blackfalds, Alta., Mr. Gregson 
reported that he first met with the larvse on August 27, 1901, on which date 
he found three specimens feeding on aspen poplar. In some notes which he 
sent to us at the time it is stated that larvse seemed to be full grown on September 
22, and that since August 27 they had moulted once. They fed very httle and 
hibernated among dead leaves and twigs in a breeding cage which was kept 
in an outhouse. In the spring of 1902, the larvse were brought indoors and 
early strawberry leaves offered as food, until the leaves of aspen poplar appeared. 
This latter food was continually present in the breeding cage, but unhke the 
larvse reared by Mr. Johansen, referred to above, these three Blackfalds larvae 
refused all food and eventually spun their cocoons among the dead leaves and 
twigs at the bottom of the cage. The moths emerged about June 10. 
The Blackfalds larvse are much grayer than the Collinson point larvse 
and the upper lateral yellow hairs are decidedly brighter being citron-yellow 
in colour. The number of yellow hairs, however, varies in the specimens. 
Another larva, immature, in the National collection at Ottawa, from Fuller- 
ton, Hudson bay, collected on July 7, 1904, by Mr. Andrew Halkett, bears still 
lighter greyish feathered hairs, but otherwise is similar to the Blackfalds larvse. 
In addition to the larvse collected at Collinson point and Demarcation 
point, Mr. Johansen also collected larvse at Nome, Alaska, and at Chantry 
island, Northwest Territories, but unfortunately no adults were reared. These 
may be 7'ossi but owing to the condition of the larvse brought back it is difficult 
to determine them definitely. 
In addition to the material collected by the Southern Party of the Canadian 
Arctic Expedition, I have also examined five cocoons collected by members of 
the Northern Party, namely, four by Messrs. Castel and Emiu, from near cape 
Ross, Melville island, about June 20, 1916. Three of these I would determine 
as being those of G. rossi, but the pupa of the fourth differs from that of the 
others in having black dorsal hair which according to Dyar^ is a characteristic 
of G. groenlandica. The fifth cocoon is from Armstrong point, Victoria island, 
Northwest Territories, summer, 1916 (J. Hadley). 
From cocoons collected by Mr. Johansen, the tachinid parasite Euphorocera 
gelida Coq. was reared. As many as six puparia were found in one cocoon. 
The species was determined by Mr. J. R. Malloch, and is referred to in his 
report on diptera collected by members of the Canadian Arctic Expedition"*. 
From Mr. Johansen's notes I gather that he reared also a hj^menopterous para- 
site. 
In the Canadian National collection there is a male specimen of the moth 
from Ashe inlet. North Bluff, Hudson's strait, August 13, 1884 (R. Bell). 
1 Psyche, VII, 328. 
2 Rept. Ent. Soc. Ont., 1903. 
■« Psyche, VIII, 153. 
* Rep. Canad. Arc+. Exped., 1913-18, III, C, p. 57c. 1919. 
