468 Messrs. Elwes and Edwards on 
hind margin on vein 4, about as far as the ocellus in cell 5. Hind 
wing pale grey-brown, inclining to whitish (sometimes absolutely 
whitish) on the dise; a broad irregular dark brown median band, 
sharply defined on both edges, where its colour is intensified, but 
without any sharply projecting angles; a distinct ocellus (some- 
times absent) in cell 2, coinciding with that on the upper side; 
veins conspicuously whitish. Upper fringe of palpi whitish. Clasp 
of the chryxus type. Exp. 42—44 mm. 
Amongst the described species this insect bears the 
greatest superficial resemblance to C!. taygete, from 
Labrador, but the latter is larger, non-ocellate, and nor- 
mally has a conspicuous sex-mark in the 3. 
I found three males of this species in a small collection 
made by Mr. F. H. Wolley-Dod, near Calgary, in 1893. 
In the same collection were specimens of varuna, of 
which at first I thought it might possibly be a variety, 
but as Mr. Wolley-Dod assured me that it appears three 
weeks earlier than the latter in the same localities, and 
being in perfection on May 16th, whilst varuna was not 
out till about June 11th. 
Mr. J. Edwards finds that the clasp-form is very 
different, and as the band of the under side in the three 
specimens also constantly differs from that of varuna, I 
think there can be no doubt that it is a good species. I 
cannot believe that this insect is confined to this locality, 
which is of a thoroughly prairie character, forty miles 
from the true base of the mountains, and has an ex- 
tremely cold winter and warm summer; but the very 
early appearance of the insect probably accounts for its 
not having been found before by one or other of the few 
entomologists who have crossed the continent in this 
latitude.* 
Ci. chryxus.—A very abundant species both in Colo- 
rado, from about 9000—12,000 ft., and in the Rocky 
Mountains, from 4000—7000 ft., coming out at the end 
of June and in July. It was just appearing at 6000 ft. 
when I left the Yellowstone on June 15th. It isa wood- 
land rather than an alpine species, frequenting rocky 
hill-sides among conifers, and settling, usually, on a 
* Since this was written I have found, in the British Museum, a 
male, taken at Moosejaw, a station on the Canada Pacific Railway, 
400 miles east of Calgary, by the Rev. J. H. Keen, on May 12th, 
1890, which is much smaller, but otherwise agrees with alberta, 
