516 BULLETIN UNITED STATES GEOLOGICAL SUKVEY. 



Yukon Eiver, and from various parts of British America. P. cardui has 

 its range more to the southward, and abounds in Arizona and New 

 Mexico, where antiopa is but occasional. The larvae of both species are 

 gregarious, those of antio;pa feeding on willow, of cardui principally on 

 thistle. 



13. Aglais milberti, Godart. 



A few specimens of this were taken at Chief Mountain, August 22. 

 The species ranges eastward to the Atlantic, but is nowhere common. In 

 Colorado, Mr. Mead found it abundant, and saw large numbers of the 

 larvae, which are gregarious and feed on willow. Probably this species 

 is more abundant in the Eocky Mountains than elsewhere. I have not 

 received it from States to the south of Colorado, but in British America 

 it is found as far north as Fort Simpson on the Mackenzie Eiver. 



No other Vanessans were taken, but doubtless j-alhum and Imntera 

 are also common on the forty-ninth parallel. Orapta faunus and progne 

 may also be found, and perhaps sephyrus and satyrus. 



No species of Limenitis were taken, tho'ugh doubtless one or more 

 species would have been abundant earlier in the season ; arthemis, and 

 its supposed dimorphic variety proserpina, and tceidemeyeri, the latter 

 ranging over the mountains from Arizona to Montana, and artJtemis to 

 the northward as far as Fort Simpson. ' 



SATYEID.F:. 



14. Coenonymplia ocJtracea, Edwards. 



15. Ccenonympha inornata, Edwards. 



The former light ochre-yellow, the other dark brown, changing to 

 umber. Several specimens from different localities were taken. These 

 are small butterflies, expanding about one inch, and inhabit the Plains, 

 their larvae feeding on the blades of grasses. Species of this genus 

 abound in all the valleys of the Eocky Mountains, and to the westward 

 as far as the Pacific, but to the eastward are unknown. 



16. Satyrus hooj^is, Behr. 



Chief Mountain, July 21. Eepresented by a single specimen. This 

 species belongs rather to Oregon and British Columbia, being apparently 

 very rarely found in the Eocky Mountains. I have not seen it from 

 Colorado, and but once or twice in Dr. Haydeu's collections from 

 Montana. It is one of our largest species, size of alope, and is without 

 the yellow band in fore wings seen in that species, and usually has no 

 ocelli on the under side of the hind wings. 



17. Satyrus charon, Edwards. 



A few specimens were taken at Frenchraan'-s Eiver and Chief Mount- 

 ain. This is a small, black species, first noticed by Mr. Mead in Colorado, 



