NORTH AMERICAN BUTTERFLIES. 201 



near base of fore wings. Beneath, paler, spots enlarged. Expands 

 1.25. Habitat, Calorado, Nevada, Colifornia, and Oregon. 



oGO. PYRGUS XANTHUS Edw. 

 Xanthus Checker. 

 Pale black above, white spotted ; on fore wings a sub-marginal row, 

 and a row within this ; a spot at end of cell. On hind wings a margi- 

 nal row of spots, and another within this, in cell, a streak. Beneath, 

 dusky, grayish tinged; spots repeated, greatly enlarged and confluent; 

 at base of cell on hind wing is a white spot. Expands .80. Habitat, 

 Southern Colorado. 



561. PYRGUS SCRIPTURA Be. • 



Small Checker. 



Size, small. Brown above, with rows of small white spots, two 

 w^hite spots near base of fore wings. Under side of fore wings, whitish 

 with spots distinct. Habitat, California, Arizona, and Montana. 



562. PYRGUS NESSUS Edw. 

 Nessus Checker. 

 Pale brown above ; a black band crosses both wings, formed of lon- 

 gitudinal stripes, one to each interspace, and a narrow, more confluent 

 band crosses basal area of hind wing ; along outer margin is a dash of 

 gray, in each interspace, not distinct. Three triangular spots on upper 

 margin, and three others half way to apex. On middle of wing are two 

 marks, forming a V-shaped spot, not quite joined at angle ; hind wings 

 have a similar spot near outer angle. Paler beneath, with spots repeat- 

 ed. Expands 1.00 to 1.10. Habitat, Coast to San Antonio, Texas. 



GENUS LXI. NISONIADES. BANDED SKIPPERS. 

 Size, small to medium. Colors dark, nearly black 

 with no prominent markings. Fore wings, triangular ; hind 

 win<!;s, rounded. Antennae, with club curved. Fore wino" 

 of male furnished with a groove along basal portion, which 

 is capable of opening. TypeN. juvenalsis. (Plate X, 9.) 



563. NISONIADES BRIZO Bd-Lec. 

 Bluish Skipper. 

 Dark brown above. Fore wings with two double, black bands, blu- 

 ish centered ; space between the two, yellowish, and between the outer 



