THE CANADIAN ENTOMOLOGIST. 109 



ON CERTAIN SPECIES OF SATYRUS. 



BY W. H. EDWARDS, COALBURGH, W. VA. 



(Continued from Page 94.) 



Conclusion. — The North American species of this genus may be 

 divided into three Groups, with several sub-groups. Group 1 comprises 

 Pegala and all the larger species. Group 2 Silveslris and others, character- 

 ized by their small size, and the peculiar outline of the discal band on under 

 side of hind wings, there being two long serrations against end of cell. This 

 division will throw Meadii into Group 1, in which the band has a rounded 

 prominence against cell. Group 3 comprises Sthenele only. 



It seems to me probable that the species forming the first sub-group 

 of Group 1 have originated with a form either identical with Pegala, or 

 very near it, characterized by a rufous band on which was a single ocellus, 

 by an ocellus at anal angle, and six complete ocelli on under side of hind 

 wing. And it may have occupied a considerable territory, at least 

 including what is now the southern tier of States. At present, Pegala is 

 restricted pretty much to the vicinity of the Gulf of Mexico, and a strip 

 along the Atlantic coast, at least as far to the north as Charleston, S. C. 

 This is but a small area when compared with that occupied by Alope and 

 its co-form Nephele. The two species, Alope and Pegala, are separated by 

 a sandy zone, which the former does not penetrate, and the latter at most 

 but occasionally. 



It will be noticed that Pegala possesses in perfection many points which 

 are found in one or other or all the members of the sub-group. It is 

 considerably the largest, though occasionally an Alope Texana fully 

 equals it. Its peculiar brown color on upper side and gray-brown on lower 

 side passes into Alope, which gradually changes into the darker shade of 

 Nephele. The rufous band becomes yellow in Alope, but breaks out in 

 that species in certain localities, as seen in var. maritima. After the band 

 has become suppressed in Nephele, every now and then it reappears in 

 greater or less degree, even in Olympus and Boopis. If the original form 

 presented a single ocellus, that is now a prominent characteristic of 

 Pegala, bnt there has come to be a certain modification, so that in some 

 cases, in the female, there are two complete ocelli, but in many more of 

 both sexes there are dots and small spots in place of a second ocellus. In 



