THE CANADIAN ENTOMOLOGIST. 45 



pink Stripe on the under side of the hind wings is prominent, and both 

 pairs of wings are margined with a narrow stripe, in some places a mere 

 line of pink extending on the primaries from near the base along the costal 

 and outer margins to the anal angle, and on the secondaries along the 

 anterior and outer margins to the anal angle. On the upper side of the 

 hind wings the distribution of orange is very similar to that in the summer 

 form, but the marginal band of black, which in the latter is comparatively 

 broad and dentated within in the fall form, is narrow and interrupted by 

 the veinlets, so that it is really composed of a series of spots, sub-triangular 

 in shape, with the apex acute and sometimes prolonged into a narrow 

 line which extends into the orange as much as three-sixteenths of an inch. 

 The coloration of the female of this series is so remarkable that it seems 

 to deserve a name, as apparently a dimorphic or at least an aberrant form, 

 and I propose that it be called rosa, if it should be found to be a constant 

 variation. The upper surface of the primaries does not differ essentially 

 from the type. The whole upper surface of the secondaries is powdered 

 with brownish-black and orange scales.. The black scales are more 

 thickly clustered between the discal orange spot, which is partially 

 obscured by them, and the outer margin. This very much broadened 

 band only partially and unequally obscures the yellow ground colour so 

 that it includes within it a sub-marginal row of large, round, yellow spots, 

 about four in number. The under side of the primaries have the " bright 

 yellow" of the apical portion replaced by bright, deep-rose pink. The 

 under sides of the secondaries are completely suffused with pink, the 

 greenish-yellow scales of the ground colour being partially exposed only 

 along the veins and veinlets. The silvered " pupils " are all that remain 

 of the discal spot and its accompanying spot without the cell. The pink 

 of the under surface is so prevalent that when the butterfly is at rest no 

 other colour is visible, and it looks like a pink blossom. My attention 

 was first called to it by seeing a large Colias a it.\\' yards in front of me 

 disappear just when I expected to see it at rest on a clover head, as it 

 would fly up at intervals I followed hoping to catch it resting but always 

 puzzled to see it apparently dive head first into the clover. At last, 

 growing impatient, I attempted to " force the fighting," and although I 

 missed my game I so disturbed its flight that I caught a glimpse for the 

 first time of the pink under surface. I was now thoroughly interested 

 and I employed all my arts in vain to decoy or force the wary butterfly 

 into my net. In a few minutes after 1 had given up the pursuit I caught 



