Hagen.] 164 [December 27, 



Colias occidentalis. 



C. occidentalis. Scudd. Proc. B. S. N. H., ix, p. 109, 1862. 



W. H. Edw., N. A. Butt. Vol. i, Colias 7. — Can. 



Entom. Vol. xiv, p. 56. 

 H. Edw., Colias p. 9. (Calif. Acad.) 

 Brooklyn Bull., Jan. 1879. 

 Strecker, Amer. Macrol. p. 82. Philodice var. e. 



In the collection of the museum are one male and two females 

 of Mr. Scudder's types ; all collected by Mr. A. Agassiz, May 

 16, near Port Townsend, Wash. Terr., Gulf of Georgia. Mr. 

 Scudder states he compared two males and three females, among 

 them some from Fort Simpson communicated by Mr. W. H. 

 Edwards. None of the types is in Mr. Scudder's collection, as 

 he has informed me ; so the specimens not here are probably those 

 communicated by Mr. Edwards. Mr. Scudder has not seen the 

 yellow female. 



As I stated under C. Scudderi the yellow female of this species 

 and of C. occidentalis do not show in the figures and description 

 of Mr. H. W. Edwards any difference whatsoever, and must be 

 considered as identical till information is given which would 

 justify Mr. Edward's views. 



The white female is described by Mr. Scudder and figured by 

 Mr. W. H. Edwards. His description is only " upper side greenish 

 white, secondaries with a broad border enclosing whitish spots as 

 on primaries." It would be impossible to form an opinion from 

 this description, if there were not the type before me, which 

 agrees exactly with Mr. Scudder's very detailed description. 

 There is no doubt that these white females belong to C. eury- 

 theme. Mr. Agassiz has collected on the same day and place one 

 male of C. occidentalis, numerous males and females of C. eury- 

 theme and two white females. The last are a little paler than com- 

 monly and the black bands and marks more grayish. I have 

 before me similar females from Colorado, which I sent years ago 

 to Mr. W. H. Edwards, to get his opinion about it, and the 

 label " Eurytheme, white female," in his handwriting is still on 

 the pin. Another similar female, also collected together with 

 numerous specimens of C. eurytheme in Oregon is before me. 

 The more yellowish tinge especially of the underside is not an 



