Genus CEneis 
the parts of the United States immediately contiguous to the 
Canadian line. The most widely known of all the species up to 
this time is the White Mountain Butterfly, CEneis semidea , Say, 
a colony of which has existed probably ever since the glacial 
period upon the loftiest summit of Mount Washington, in New 
Hampshire. A number of species are found in the region of the 
Rocky Mountains. One species, CEneis jutta , Hubner, occurs in 
Maine, Nova Scotia, and parts adjacent. There are in all about 
a score of species of this genus recognized by authors as occur¬ 
ring in our fauna. In spite of the fact that these insects are 
boreal or arctic in their habits, Mr. W. H. Edwards has with 
marvelous skill and patience succeeded in obtaining the eggs 
and rearing at his home in Coalburg, West Virginia, a number 
of species. We are indebted to him for more of our knowledge 
of the generic characteristics of these insects, in their early stages, 
than had been ascertained hitherto during-a century of investi¬ 
gation. His work is one of the beautiful triumphs of that endur¬ 
ing zeal which is a supreme quality in the naturalist. In their 
early stages all of the species show a close likeness to one an¬ 
other. 
(1) CEneis gigas, Butler, Plate XXVII, Fig. I, $ ; Fig. 2, $ 
(The Greater Arctic). 
Butterfly.—This, one of the largest species in the genus, 
occurs on Vancouver’s Island. The butterfly hides among the 
dark mosses and upon the trunks of prostrate trees. The males 
are vigilant and inquisitive, and dart out suddenly when alarmed, 
or attracted by passing insects. The females have a slower and 
more leisurely flight and are more readily taken. Expanse, 2.00- 
2.25 inches. 
Early Stages.— Edwards has figured the egg and the cater¬ 
pillar in its first three stages, but the remaining life-history of 
the species awaits investigation. 
(2) CEneis iduna, Edwards, Plate XXVII, Fig. 4, & (The 
Iduna Butterfly). 
Butterfly.—This insect, which even exceeds CE. gigas in size, 
is found on the Coast Range in northern California. It is 
decidedly lighter on the outer third of the wings than the pre¬ 
ceding species, the male being prevalently a pale yellowish- 
brown, with the basal and median areas of the fore wing dark 
brown. On the under side the wings are somewhat lighter than 
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