HESPERIOIDEA OF AMERICA 73 



kota, Sioux City, Iowa, late June and early July, late August and early 

 September. Described from Dodge County, Neb. 



The under surface is usually immaculate yellow, in the female sometimes 

 grayish and usually with small pale spots. The spots on the upper surface 

 of the primaries in the female are very pale, and this sex closely resembles 

 attains. The males of this species may be distinguished by the more ex- 

 tensive pale areas of the upper surface and their lighter shade. 



19a. race MONTANA 

 PampMla pawnee subsp. montana Skinner, Ent. News xxii, 413, 1911. 



California, Colorado, Montana. 



A specimen in the Barnes collection which has been compared with the 

 type is much darker than normal pawnee, both above and below. 



20. PAMPHILA 8ASSACUS 



Eesperia sassacus Harris, Ins. Inj. Veg., 3rd ed., 315, 1862. 



Scudder, Butt. New Eng. ii, 1641, 1889. 



Holland, Butterfly Book 348, pi. xlvi, f. 13, 1898. 



Holland, Butterfly Book pi. xlvii, f. 44, 1898, (not sylvanoides) . 



Kellogg, Am. Ins. pi. x, f. 5, 1904, 



New Jersey, New York and Connecticut, westward into Iowa; June, 

 July, August. 



20a. race MANITOBOIDES 

 Pamphila manitoboides Fletcher, Rep. Ent. Soc. Ont. for 1888, p. 85, 1889. 



Ontario, Canada. 



Dr. W. T. M. Forbes has called my attention to this relationship of 

 manitoboides, which seems so close that I am adopting his arrangement. 

 Formerly it has been called a distinct species or a form of comma, but 

 it is identical with sassaciis except in the darker color and greater contrast 

 of the markings of the lower surface. 



20b. race DACOTAE 



Pamphila sassacus, subsp. dacotae Skinner, Ent. News xxii, 412, 1911. 



South Dakota, June. Sioux City, Iowa. 



I have seen paratypes of both sexes in the Barnes collection, and in the 

 males the only difference which I can formulate between this form and 

 sassacus is a general darkness of color and obscureness of the under sur- 

 face. The females have the markings of the upper surface greatly reduced 

 and diffuse, and the lower surface grayish with small, indefinite spots. 



21. PAMPHILA HORUS 



Eesperia horns Edw., Trans. Am. Ent. Soc. iii, 277, 1871. 

 Barnes & McDunnough, Contributions rv, (2), 80, 1918. 



Type locality Dallas, Texas. Apparently this species belongs in Pam- 

 phila, but I know nothing of it except from the description and Barnes and 

 McDunnough 's note. 



