Lepidoptera 39 1 



point. This latter description is in general similar to Dyar's description of 

 rossi 1 . 



The larvae reared by Mr. Johansen were fed in captivity on mountain 

 saxifraga (S. oppositifolia L.) and willow, chiefly the latter as soon as available. 



In the Entomological Record for 1903 2 the species is recorded from Black- 

 falds, Alta., where in 1902 and 1903 Mr. P. B. Gregson found the larvae on 

 willow and poplar. Mr. Gregson at the time forwarded to us some larvae and 

 from one of these a male moth was reared. Larvae 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 larvae 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 larvae seemed to be full grown on September 

 22, and that since August 27 they had nxoulted once. They fed very little and 

 hibernated among dead leaves and twigs in a breeding cage which was kept 

 in an outhouse. In the spring of 1902, the larvae 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 unlike the 

 larvae 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 larvae are much grayer than the Collinson point larvae 

 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 larvae. 



In addition to the larvae collected at Collinson point and Demarcation 

 point, Mr. Johansen also collected larvae at Nome, Alaska, and at Chantry 

 island, Northwest Territories, but unfortunately no adults were reared. These 

 may be rossi but owing to the condition of the. larvae 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 3 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 4 . 

 From Mr. Johansen's notes I gather that he reared also a hymenopterous 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 Kept. Ent. Soc. Ont., 1903. 



3 Psyche, VIII, 153. 



4 Rep. Canad. Arc*. Exped., 1913-18, III, C, p. 57c. 1919. 



