100 



spots complete and consist of dark brown scales on an ochraceons 

 ground, those next inner margin of primaries enlarged and the interior 

 scales replaced by ochraceous; the submarginal lunules on incision of 

 primaries indistinct and on secondaries obsolete.' This hardly applies 

 to rusticus, no mention being made of the green color of the sub- 

 marginal dots and lunules so noticeable in this latter species ; it does 

 however apply excellently to the underside of zcphyrus Edw. and we 

 believe that silvius may possibly be a form of this species. In the Hy. 

 Edwards' Collection is a $ with a printed 'Co-type' label and a writ- 

 ten label 'silvius' which bears out this association ; the ground color 

 of the underside is however a peculiar deep brown color such as we 

 have never seen in any other specimen. 



P. rusticus Edw. 



We fail to separate this from f annus, but if desired the name 

 may be retained for the western coast form of this species, the type 

 specimens being collected by Hy. Edwards in Vancouver Is., B. C, and 

 at Big Trees, Calaveras Co., Calif. The types are missing in the 

 Edwards' Collection with the exception of a possible single 9 labelled 

 "California" and marked 'type'. In the Henry Edwards' Collection 

 is a $ from each of the above localities and these are probably the 

 types. 



P. oreas Edw. 



This is listed as a variety or dimorphic form of silenus Edw. on 

 the strength of Scudder's remarks in Buff. Bull. II, 252. If this be 

 so, according to the rules of nomenclature oreas must be used as the 

 specific and silenus as the varietal name, the former having a year's 

 priority. The types of oreas, which came from Dr. Behr, were pre- 

 sumably returned to him and lost with the rest of his collection in 

 the San Francisco earthquake ; the S and 9 now marked type in the 

 Edwards' Collection are labelled "N. Calif. O. B." (O. Baron) and 

 cannot be considered more than typical in any case. The species is 

 one of the doubtful ones whose biology needs clearing up. 



P. silenus Edw. 



The species was described from a $ taken by Hy. Edwards in 

 Oregon; the specimen marked type in the W. H. Edwards' Collection 

 is labelled W. T. (Wash. Terr.) probably one of Morrison's captures. 

 It can only be considered as typical, not a type. The true type is in 

 the Hy. Edwards' Collection in New York. 



