146 



BULLETIN UNIVERSITY OF MONTANA. 



interspaces three-fourths of the distance from the base to the apex; two 

 spots beyond the cell, the upper half way from the third spot to the 

 margin; spot five inline with the first three: and an oblique row of four 

 more, — two m the median interspaces and the other two in the medio- 

 submedian interspace, one next to each vein. Besides this, the cross 

 vein at the end of the cell has some white scales. In addition to these, 

 there ai'e five v/hite spots on the costal edge. 



The hind wings have two obscure rows of white spots, the first cross- 

 ing the end of the cell, the spot on the cell being the most distinct; the 

 second sub-terminal, consisting of a series of inter-venular, somewhat 

 sagittate spots. Fringes white, cut with black at the ends of the veins. 



Under side a little paler than the upper, sprinkled over with white 

 scales so as to be grayish brown. The spots of the fore wings are re- 

 peated, but enlarged and coalescing. The hind wings have three dis- 

 tinct bands of white, one near the base which does not show on the 

 upper side, consisting of three patches united; the middle one enlarged 

 and blended; the sub-terminal one not much more prominent than on 

 the upper surface. 



Body black above, with gray hairs, the scales and hairs below white; 

 antennae annulate with black and white; top of club ferruginous. 



Distribution — From the Atlantic coast in New York, West Virginia 

 and North Carolina westward to Colorado, north to Montana. In Mon- 

 tana it has been taken by Elrod at Sinyaleamin lake in the Mission 

 mountains (two) ; Brandegee has one in his collection from Presto Pass, 

 near Helena; Cooley has one from Shields river at elevation of 9,000 

 feet. These two last are small and quite dark, but have the character- 

 istic markings of the species. 



THE SMALL CHECKERED SKIPPER. Scelothrix scriptura, Boisduval. 



Fig. 106. 



Fig. lOG. Scelothrix scriptura. 



Butterfly— Small, expanse .85 inch, 21 mm. The hind wings on the 

 upper side are about entirely dark gray, the only white being a spot or 

 two at the end of the cell. The fore wings above marked somewhat as iu 

 centaurea. On the under side the fore wings are blackish toward the 

 base, with the costa, the apex, and the outer margin narrowly whitish. 

 The hind wings below are pale, with an incomplete median band of white 

 spots and broad white fringes, which are not checkered with darker color 

 as in the preceding species. 



Early Stages — These are unknown. 



