THE CANADIAN ENTOMOLOGIST. 225 



Alberta, which was unknown to Elwes, differs, as is usual in the genus, 

 from the male, in the wings, being broader and more rounded ; the colour 

 is same as ^ ; the outer edge of mesial band on under side of secondaries 

 is markedly defined, but the whole space from that edge to the base of 

 the wing is heavily striated. Of Chryxns I have examples from Utah of 

 the pale yellowish colour of Nevadensis, which, on the upper surface, 

 they so wonderfully resemble as to be almost mistaken for medium-sized 

 examples of that species. There are yet fairly strong grounds for Elwes's 

 first impression that Ivallda was a variety of Chryxus, as the only 

 apparent difference worth noting is that of colour, but there is too little 

 of Ivallda known to form any certain conclusion. 



From Morrison I also received a ? Chionobas, taken by him at Mt. 

 Graham, Arizona. The easiest v/ay to describe this would be to say it is 

 the counterpart oi Ch. Fulla, Ev.,from the Tarbagatai, a species but little 

 known in American collections ; this closely-allied American species, 

 which we might designate as Ch. Z>tzz/;7Z, expands nearly i^ inches, is 

 whitish ochraceous, almost the colour of Ivallda, the primaries finely 

 striated on costa, a broad, submarginal band scarcely a shade paler than 

 the part interior to it, from which it is separated by a brown line pro- 

 duced in an angle at 2nd discoidal nervure, from whence it recedes in- 

 wardly at the costa ; in this band are three small black spots, in cells 2, 

 3 and 5 the uppermost one largest and minutely pupilled with white. A 

 gray marginal band. Fringe from anal angle half way brown, rest brown 

 and whitish alternately. Inferiors have a broad, pale, submarginal band, 

 on which, in cell 2, is a minute black dot or point. The mesial band 

 defined by a dark shade at edges A gray marginal band. Fringe 

 whitish, with brown at termination of veins. Reverse surface paler than 

 above. Secondaries almost white, markings of upper surface reproduced. 

 Primaries towards exterior margin delicately striated, the spot in cell 3 

 wanting. Inferiors most daintily mottled, much finer than in its Asiatic 

 analogue or in any other American species. A broad mesial band very 

 distinctly defined and shaded with dark brown at its edges. Towards 

 the margin of the wing a tendency in the mottling to segregation. Fringes 

 on all wings as above. I have only seen this one 9 example, and on 

 one example it is not to be known whether this be identical with the 

 Central Asiatic species compared with it (to my examples of which its 

 resemblance is amazing), which is possible, but scarcely probable, or 

 whether it be distinct, which, as far as the American species are con- 

 cerned, it certainly is, is one of those problems the future must solve. 



