374 THE CANADIAN ENTOMOLOGIST. 



in which he gives several food-plants, a description of the egg, of the larvae 

 in the several stages of development, and some valuable general informa- 

 tion. Up to this time very little had been published as to the geograph- 

 ical range of the species, 



"In the spring of 1882 I received a parcel of colutnbia cocoons, 

 collected by W. G. A. Brodie near Carberry, Manitoba. They were 

 attached to twigs of the Elaag7ius argentea, and I was informed the 

 larvae must have fed on the leaves of this shrub. When the imagoes 

 emerged, they differed so much from Muskoka specimens that I fancied 

 there must be a specific difference, and so I sent specimens of the moth 

 and of the cocoons to the late Hy. Edwards. He did not know E. 

 arge7itea as a food-plant of P. Columbia. He remarked the difference 

 between the northern form sent by me and the usual form, and thought, 

 if permanent, it was at least sub-specific ; and he suggested that it should 

 be described and named. 



"Early in 1883 I received a package of cocoons of/*. Columbia and 

 of T. polyphemus, collected by W. G. A. Brodie near Pelly, N.-W. T. 

 Only one imago emerged from this lot, from a F. Columbia cocoon, and it 

 differed so very much from the Manitoba form that I considered it a well- 

 marked variety, being much less in size and of much brighter colours, and 

 the boundaries of the colours much more distinct. All these facts and 

 descriptions of the two forms were embodied in a paper which I read 

 before a meeting of the Natural History Society of Toronto, and I also 

 submitted type specimens of the two forms. For the Carberry form I 

 proposed the name P. coliunbia noko?niSy and for the Pelly form P. 

 Columbia wi7ionah. 



"It would appear that the fiokoinis type is generally distributed over 

 the Province of Manitoba, and that the common food-plant is Elceagnus 

 argefiiea, and that probably Shepherdia argeiitea (Wolf Willow) may also 

 be a food-plant. I do not know the northern nor the western limit of ^. 

 argentea, but Mr. Jas. M. Milne, who was on the Government survey, 

 has informed me that he has found the shrub on the eighth base line, 

 which lies to the north of the South Saskatchewan, and as far west as the 

 cactus hills, and there can be little doubt that the range of P. Columbia 

 nokomis is co-terminous with the range of this food-plant, E. argeniea. 



"The food-plants of the southern form (P. Columbia) in Ontario, 

 Quebec and in the State of Maine, so far fairly well identified, are Primus 

 virgiiiiaiia^ Prunus peiinsylvanica^ Nemopanthes cafiade?isis, Kabfiia 

 afigusti/olia, Rhodora canadetisis, Salix sp., Abies Jiigra^ Larix americana. 



