COLIAS IV. 
I have received a letter from Dr. James S. Bailey of Albany, N. Y., stating 
that in the autumn ot 187G he took what he supposed to be Keewciydin within 
five miles of Albany ; and in Vol. VII., Canadian Entomologist, 1875, Mr. C. 
W. Pearson of Montreal, Canada, mentions taking an Eury theme fresh from 
chrysalis. 
The butterfly figured on Plate of Keewaydin, in Vol. I., as No. 7, supposed 
to be a variety of that species, is regarded by Mr. Henry Edwards as distinct, 
and has recently been described by him as C. Harfordii. 
Note. — After the foregoing pages were in type, I received letters from Mr. Mead, in California, passages 
from which well illustrate the extreme differences in climate in that State, and the effect upon insect life. 
“ Vo Semite, June 10, 1878. Up the watercourse behind the hotel, I found quite a snow-bank remaining, 
and near it the plants had hardly more than budded. One clump of a certain bush was in full blossom on the 
side towards the ravine, and was loaded with nearly ripe fruit on the other side. This state of things, of 
course, causes a succession of fresh individuals among the butterflies, so that spring and summer broods cannot 
be well defined from each other where they exist.” June 16. « The snow lies in large patches in the high¬ 
lands still, and the willows are just putting forth their catkins. In ten days or two weeks there' ought to be 
something to collect up there.” At Glacier Point, in the same region, Mr. Mead notices that by a few flut- 
terings of the wing, a butterfly may drop two thousand feet or more perpendicular, and arrive at a wholly 
different climate. 
From Tallae Point, Lake Tahoe, on the eastern boundary line of California, August 4 : “ Tallac Peak, on 
the south side of the lake, is exceedingly precipitous, and the snow lies in great banks in the ravines all sum¬ 
mer long. On the north side, however, the mountain slopes with a comparatively gentle inclination, and is 
overgrown with bunch grass, in many places even to within one or two hundred yards of the summit. Part 
way up the mountain I toox Pyrameis Carye, a butterfly found abundantly throughout the lowlands and even 
in the tropics. This region is said not to have very intensely cold winters, but the snow falls in enormous 
quantities — twenty feet deep on a level — so that the ranches, except some on the lake shore, are entirely 
deserted in winter, the farmers moving with their cattle to the lowlands, where pasturage is good.” 
