126 THE CANADIAN ENTOMOLOGIST. 



species of Thyatira in the east and another in the west, so Europe has 

 one pecuhar species, and, beyond the Ural Mountains, in Siberia, there 

 is found a fourth. All these species differ in size and markings, so that 

 they are readily to be distinguished; while the pattern of ornamentation, pale 

 or pink blotches on the brown primaries, is preserved throughout, perhaps 

 most strongly contrasting in the European Thyatira batis, which English 

 collectors call by the pretty name of " Peach Blossom." Our eastern 

 species of Habrosyne, H. scripta, surpasses, I think, the European H. 

 derasa in beauty ; it was first described from Canadian specimens by the 

 eminent naturalist, the late Mr. Gosse, after whom I have given it the 

 English name of *' Gosse's Arches." 



A LIST OF THE BUTTERFLIES OF PHILADELPHIA, PA. 



BY HENRY SKINNER, M.D., AND E. M. AARON. 



Appreciating the value to students in geographical distribution of 

 faunal lists of a given region, with notes thereon, and the interest that 

 such lists have for beginners in the same field in after years, we have con- 

 cluded to publish here a list of the Diurnal Lepidoptera known to us 

 to have been taken in the vicinity of Philadelphia. A circle drawn around 

 the new City Hall, with a radius of ten miles, is the line of limit to the 

 " vicinity " here treated of 



We wish to disclaim any intention to enter into the question of 

 synonymy in this paper, and have, therefore, impHcitly followed the cata- 

 logue of Mr. W. H. Edwards, edition of 1884, as being the most com- 

 plete and at the same time the most accessible to students. The collec- 

 tions of the Academy of Natural Sciences of Philadelphia, of the Ameri- 

 can Entomological Society, and of Messrs. Peale*, Ridings*, Wilt*, 

 Blake, Laurent, Johnson, Keen, Bartholomew, et al, have been looked 

 through by one or both of us, or their owners have been consulted as to 

 their captures in this locality. Very few of the species here enumerated 

 are unknown to us personally as natives of this region. 



To this we have added a brief list of species heretofore accredited to 

 this region on what seem to us to be doubtful or insufficient grounds. 



* Now in the possession of the American Entomol. Soc. 



