COLIAS IY. 
sentatives they are. The males are easy to recognize, but the females approach 
each other so much, that, in some of my specimens I am puzzled myself, especially 
when they are not quite fresh.” 
I have received (December 1868,) a very interesting series of specimens of 
both Eurytheme and Eeewaydin from Mr. Henry Edwards, of San Francisco, a 
careful and experienced observer, showing a much wider variation in Keewaydin 
than in the other, both in size and color. Some of the males are very small, 
scarcely one half the size of the best developed, and they vary in color from deep 
orange to lemon-yellow. Mr. Edwards writes, “I may notice that the flight of the 
new species is much more rapid and varied than that of Eurytheme — that the only 
variety which appears in the latter is in the case of the albino female, while the 
male of the new species is constantly subject to run into the lemon-yellow variety, 
which however, is rarely so well defined as in the specimen I send you. [Figured in 
plate.] There appear to be two broods during the year, the insect being most 
abundant early in the spring, in fact, before Eurytheme makes its appearance. It 
seems to be local and by no means widely distributed. I have chiefly found it at 
Alameda and along the eastern side of the Bay as far as the San Jose district, but 
it does not appear in San Mateo County, though Eurytheme is very common there. 
As it is always hovering over plants of Medicago, I presume the caterpillar feeds 
upon that, but nothing is known by me of either larva or chrysalis at present.” 
From Illinois and vicinity of New Orleans I have received these two species 
in about equal numbers, but of a large number sent me by Prof. Moore, from Ox- 
ford, Miss., all were Eurytheme . On the other hand specimens sent by Dr. Lince- 
cum, and taken in Washington Co., Texas, have been nearly or quite all of the other 
species. Of this collection about one-fourth the females were albino, and the others 
were quite distinct in size and color from the female of Eurytheme. But two fe- 
males sent from Illinois by Mr. Walsh do very closely approach that of Eurytheme, 
and justify the remark of Dr. Behr. (Fig. 5.) 
