104 THE BIOLOGICAL REVIEW. 



several parcels of P. Columbia cocoons from Muskoka, collected 

 near Bracebridge by Capt. James Brodie and Mr. R. Mosey,, 

 and I was told they were found on the "wild cherry," (Primus 

 virginiaua ?) the dry twigs seemed to me. Many of these 

 were destroyed by parasites. The perfect imagoes which 

 emerged were of the dull-coloured southern type, corresponding 

 very well to Smith's description. I used every possible en- 

 deavour to get them paired, but failed. The ?s ovaposited 

 freely, but, of course, the ova were infertile. 



In the spring of 1882 I received a parcel of Columbia, cocoons 

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

 were attached to twigs of the Elceagnus 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 

 H. Edwards. He did not know E. argentea as a food plant of 

 P. Columbia. He remarked the difference of the northern form 

 sent by me and the usual southern form, and thought, if per- 

 manent, 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 P. 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 P. 

 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 descrip- 

 tions 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. Columbia nokomis, and 

 for the Pelly form P. Columbia winonah. I presented the types, 

 with specimens of the food plant E. argentea, to the museum of 

 the society, all of which, I understand, have been lost. The 

 paper also became the property of the society, but was not 

 considered of sufficient importance for publication, although the 



