154 

 A RARE BUTTERFLY (Erehia discoidalis, Kirby;. 



Two beautiful specimens of this butterfly, one of the rarest in the 

 'Canadian fauna, have been I'eceived from Mr. John D. Evans, who col- 

 lected them at Sudbury, on the Canadian Pacific Railway, on 12th May 

 last. 



The species was described by Kirby (Fauna Boreali- Americana, 



IV, p. 298, pi. 3, figs. 2, 3, 1837) from Cumberland House, lat. 54°. 



In 1863, several examples were taken at Fort Simpson, Mackenzie 



River, by Mrs. Christina Ross, and sent to Mr. W. H. Edwards, 



together with the types of Colias Christina, which latter was named 



after the collector. Specimens were also sent from Hudson Bay to Mr. 



Hermann Strecker. In 1889, one specimen was again sent out from 



Fort Simpson, which had been taken by Mr. Frederick Bell, in the end 



of June, 1888. Last summer, specimens were collected near Fort 



Qu'Appelle, K. W. T., by Mrs. Cora E. Rose (Can. Ent. XXI, p. 238). 



The most interesting locality of all, however, is that now discovered by 



Mr. Evans, in Ontario, at Sudbury. He took five specimens in a short 



time upon the same day, which would indicate that they were in some 



abundance. Nothing is known of the preparatory stages, but now, on 



account of the comparative accessibility of Sudbury, and the readiness 



with which the butterflies of grass-feeding caterpillars deposit their eggs, 



there is every chance that the life history of this rare insect will be 



worked out. The perfect insect is figured and described by Mr. W. H. 



Edwards in his Butterflies of North America, Series III, pt. vii. 



J. F. 



