EASTERN UNITED STATES. 273 



111. Thecla Irus, Godt. 



Expanse of wings from 1 inch to 1.25 inches. 



Three forms have until recently been included in this 

 species, two of which are still retained as varieties, while 

 the third is set apart as the next species. 



Var. Aesace, Bd. — Lee. — This has the upper side 

 of the wings dark brown, with greenish reflections. The 

 stigma on the fore wings of the males is three times as 

 long as wide. 



Under side of the wings blackish brown on the basal 

 half, and lighter beyond. The outer part of the fore 

 wing is overlaid more or less with white scales. The 

 tooth of the hind wing next outside the anal angle 

 curves outward, and there is a more or less prominent 

 black spot within the margin between the base of the 

 tooth mentioned and the one next outside. In the hoary 

 outer space of both wings is a transverse row of brown 

 points, clouded somewhat on the hind wings. 



This variety is found in the Atlantic and Western 

 States. 



Var. Massii, H. Edw. — This form has been found 

 only on Vancouver Island. 



Morris says the larva of this species feeds on Vac- 

 cinium, and is yellowish green, with two dorsal inter- 

 rupted lines ; one lateral line and eight oblique streaks 

 pale green. 



112. Thecla Henrici, Gr. — Rob. 



Expanse of wings from .85 inch to 1.1 inches. 

 This species closely resembles var. Arsace of the pre- 

 ceding species in form and color as well as in markings, 



