764 ZOOLOGY— INSECTS. 



PHYCIODES OAMILLUS, Edw. 

 Phyciodes Camillus, Edw., Trans. Am. Ent. Soc, 1871. 



This is the most abundant PJiyciodes in the mountains of Colorado, 

 and is found at all elevations below timber line during the whole summer. 

 These butterflies are very fond of flowers but do not often congregate at 

 wet spots in the road like Tharos. Some of the males resemble that species 

 quite closely, though of a different shade of fulvous above, and the under 

 surface more resembles Batesii, Reakirt, The females are quite distinct; 

 the most nearly allied species is the Californian P. Pratensis, Behr. 



trilYOIODES CANACE, Edw. 

 Phyciodes Canace, Edw., Proc. Am. Ent. Soc. Phila., 1871. 



The type of this species was taken in Southern California, The only 

 other known specimens are those collected by the expedition in 1S71, prob- 

 ably in Arizona, 



t PHYCIODES MYLITTA. 



This species is not known to occur on the eastern slope of the Rocky 

 Mountains ; but the expedition obtained specimens from Southern Utah and 

 Arizona. 



Mr. Henry Edwards writes me as follows concerning its habits : 

 " Ph. Mylitta is a common species in California, appearing about April, 

 and apparently double brooded, as I have taken fresh specimens as late as 

 August, It is an extremely restless insect, much more so than any other of the 

 genus with which I am acquainted, and, though settling frequently, it rarely 

 remains long in one place. The larva feeds on various species of thistles 

 {Carduus, Ciiicus, &c). Its published description is as follows : — Head small, 

 bronze-black, entirely covered with short black hair. Viewed from above, the 

 whole upper surface is velvety black, each segment being provided with 

 six tubercular spines, very hairy to their tip. The lateral row of spines is 

 dull ash color, with black hairs; the spines being shorter than those of the 

 dorsal region Feet and pro-legs dull ash color ; the underside of the body 

 with a fleshy tinge. Length, 0.75 inch. This species is gregarious in its 

 habits, and terribly destructive to the plant on which it may be hatched; in 

 many cases only the nerves of the leaves remaining. The caterpillars spin 



