474 Messrs. Elwes and Edwards on 
perceptible, and in most cases entirely absent. In the 
female the general tint of the under side is much more 
ochreous, and in both sexes the freckling of the fore 
wing, instead of being principally confined to the apical 
and costal areas, is more spread over the whole of the 
wing. 
Though I am not prepared to say that these characters 
are sufficient to distinguish the form specifically, yet, 
considering the widely separated habitat of the Colorado 
form from that of the White Mountain one, and the 
marked difference in its climate and vegetation, I cer- 
tainly think there is good ground for looking on it as an 
incipient species. I have taken this form on the moun- 
tains round the head of Hall’s Valley, in Clear Creek 
County, Colorado, at the same time and elevation as the 
following species ; it is by no means so abundant, how- 
ever, and seems to fly somewhat earlier, as most of the 
fresh specimens I got were females. In its habits and 
flight it is like brucei. Scudder records its presence on 
many other peaks and passes of Colorado, at 12— 
14,000 ft., as far south as Sierra Blanca, the southern 
extension of the Sangre de Christo range in 87° 80’ N. It 
is quite likely that it exists on the high peaks of Mon- 
tana, but has not yet been discovered there. 
In the British Museum are several specimens from 
various parts of Arctic America, which are very puzzling, 
and which I am not able to identify with certainty 
without closer examination of the clasps than is possible: 
four specimens from Winter Cove and Cambridge Bay, 
collected in 1885 by the Arctic Expedition under Captain 
Collinson, all of which are distinctly banded, and, in my 
Opinion, are subhyalina; one from the same locality, 
which has no band, and may be semidea ; two females 
from Repulse Bay, of which the one marked type has the 
band faint, the other has it more distinct, whilst the third 
is intermediate; and a male and female from Sir J. 
Richardson, taken in 673° N. lat., which agree better 
with taygete. 
(HZ. brucet.—I cannot add much to the account given 
by Mr. Bruce of the habits of this insect, quoted by W. H. 
Edwards. During my visit to Colorado this year I was 
able, under his guidance, to catch a great number of this 
Species during the first week in July. The weather, 
being extremely fine and hot, and the ground over which 
