l() B. C. ENTOMOLOGICAL SOCIETY 



No. 16. Lycasnopsis pseudargiolus race nigrescens Fletcher. This 

 butterfly is interesting from the fact that more varieties of it have 

 been described than of any other butterfly on the North American con- 

 tinent. Today there are no fewer than fourteen recognized races and 

 seasonal forms distributed from the Atlantic to the Paciiic. In our 

 Check Lists nigrescens is given as "generally distributed," but this is an 

 error as it does not occur on Vancouver Island. It was described from 

 specimens taken by Mr. J. W. Cockle at Kaslo, and as its name implies, 

 it is a much darker form than the one on Vancouver Island, especially 

 on the under side. I also have it from Lillooet, Penticton and Rossland. 



No. 17. Lycaenopsis pseudargiolus race nigrescens form quesnelli 

 Cockle. This form was tentatively named by Mr. Cockle, which name 

 has been accepted for the present and is listed in Barnes and McDun- 

 nough's Check List (1917). The only specimens known are two worn 

 ones taken at Bala Lake near Quesnel. 



No. 18. Lycaenopsis pseudargiolus race echo Edw. This form is 

 very common on Vancouver Island in the early Spring, and has been 

 listed in all local collections under the name of nigrescens. Echo was 

 described from California and is very common in its nimotypical locality. 



AUTHOR'S NOTE (October, 1920): 



Nos. 5 and 6. Plebeius aquilo and its race rustica. Since the above 

 paper was written I have received additional material in this group from 

 Lillooet and Chilcotin. I have given this species considerable study 

 and have come to the conclusion that all of the forms from the various 

 localities in British Columbia are conspecific. I have compared them 

 with aquilo from Labrador and with rustica from Colorado, and although 

 they bear certain characters of each, they do not exactly correspond in 

 all particulars with either. They are probably nearer to the race rustica 

 than to aquilo, but until I can procure further material, especially 

 females, it will be best to call them rustica for the present. 



In the Can. Ent., April, 1919, p. 92, Drs. Barnes and MacDunnough 

 have described a new race of Plebeius icarioides under the name of 

 blackmorei, from a long series of both sexes taken by the writer at 

 Coldstream in May, 1918. Excellent figures of the male, female, and 

 the under side of this new race, with notes thereon, are contained in the 

 Annual Report of the Provincial Museum for 1919. 



As there seems considerable difficulty amongst collectors in 

 identifying their specimens in this sub-family, I have prepared a plate 

 illustrating the under sides of sixteen forms occurring in British Col- 

 umbia. It is to be hoped that this will prove to be of some benefit to 

 our B.C. collectors in enabling them to determine their "Blues" more 

 readily than they have been able to do in the past. 



