revision of the genus Argynnis. 573 



whilst in zerene the duller and paler colour of the under 

 side is without any silver except on the marginal row. 

 These distinctions, however, are based upon Californian 

 specimens, mostly from the Shasta district, and, according 

 to Edwards's opinion in 1879 (see Can. Ent., pp. 55 — 6), 

 do not apply to Nevada specimens. He then considered 

 monticola to be only a var. of zerene, but puts them down 

 as two species in his catalogue of 1884. Farther north, 

 in the damper climate of Oregon and Washington Terri- 

 tory, as also commonly in Vancouver's Island, a darker 

 form, hremneri, occurs, which on the under side is well 

 spotted with silver in both sexes, and might be con- 

 sidered as the Pacific coast form of atlantis ; but in the 

 specimens taken on Mount Hood by Morrison {rhodope, 

 Edw.), and also occasionally in Vancouver, the silver is 

 absent, and these specimens might well be considered as 

 a northern and darker form of zerene. 



A. hippoljjta, which is also kept up by its author as a 

 species, is described without reference to its allies, and 

 seems to be something intermediate between hesperis 

 and some form of zerene or monticola. Its locality would 

 indicate that it may be nearer to them than to atlantis. 

 It was described from four males and one female only.* 



A. adiante is a form which both Strecker and Edwards 

 consider distinct, and which appears to be very local. 

 On the coast of California, according to Strecker's infor- 

 mation, it is now extinct, and all the male specimens 

 (I have seen no females) in Mr. Godman's and my 

 collection are evidently taken many years ago. But, 

 though the markings on the under side are nearly 

 obsolete in some cases, and in all faint compared with 

 those of zerene or monticola, yet they seem to be quite 

 identical, and I should certainly be inclined to set it 

 down as a variety of one of those species. This is just 

 a case in which one would be guided by the opinion of 

 local collectors, but neither Mr. H. Edwards or any one 

 else of late years seems to have mentioned this species, 

 and the opinions held twenty-five years ago, when Dr. 

 Behr was an active collector, are not conclusive. 



-'• Mr. Strecker informs me that liij^polyta was described from 

 some small examples of breinneri, given by Mr. 0. B. Johnson, of 

 Oregon, to Mr. Dodge, of Nebraska, who gave them to Mr. W. H. 

 Edwards. Some of the same catch and lot were also given to 

 Mr. Strecker. 



