109 



of the curve and the narrowest of the band being where the third 

 branch of the median nervure strikes it, and so placed much farther 

 down than in C. labradorensis or C. Philodice or C. occidentalis ; the 

 spot at the extremity of the cell is generally wanting, but when present 

 is an indistinct transverse spot of grayish scales, with a yellowish 

 centre ; there are a very few grayish scales clustered at the base of 

 the wings ; the fringe is pink ; — secondaries of the color of the pri- 

 maries, with the marginal band narrow, not crenulated interiorly, 

 extending from the second (or between the first and second) 

 branch of the median to just beyond the first branch of the subcostal 

 nervure ; diseal spot small, circular, pale orange, with a faint dusky 

 border ; fringe pink, pale towards the outer angle. 



Beneath, of a more sulphur-yellow, with scattered grayish 

 scales ; the costal border of both wings narrowly edged with pink ; 

 the diseal spot of primaries as above, but distinct ; diseal spot of 

 secondaries not small, circular, the centre composed of silvery and 

 pale pink scales mingled, with the border composed of reddish-brown 

 scales ; fii-inge pink. 



? . Above, white, with a very pale yellowish tinge ; costal bor- 

 der with a few griseous scales joining a dusky spot at tip, which has 

 the inner border illy defined, but extends with a curve around the 

 outer border rather more than half way down to the inner angle, 

 as in some specimens of C. labradorensis; the diseal spot is as in 

 the male, and indistinct ; the secondaries are immaculate, save the 

 faint diseal spot as in the male. 



Beneath. The only specimen I have is somewhat rubbed, but 

 appears not to difi'er from the male, except in being pale instead of 

 yellow. 



Head, etc., as in C. labradorensis, except the under surface of 

 the club of the antennae, which is yellowish-brown. 



Expanse of wings, ^ 2.1 in. ; $ 2 in. 5^,1?. Northern 

 shore of Lake Superior (Prof. Agassiz) ; mouth of the Saskatchewan 

 River, British America. (S. H. Scudder.) 



COLIAS OCCIDENTALIS (nOV. sp.) 



^ . Above, primaries color of C. philodice ; the marginal band 

 quite broad ; the inner border curved much as in C. labradorensis, 

 commencing at a point a little inside the termination of the costal 

 nervure, and extending inwards along the internal border rather 

 more than in C. labradorensis, parallel to the border from the 

 upper median nervule to the sub-median nervure ; a few distant 

 grayish scales are scattered along the costal border, scarcely affect- 

 ing the general tint ; they are clustered profusely at the base, but 

 extend over only a narrow space ; the diseal spot is small, oval, 



