ARGYNNIS XI Y. 
of the present year, (1871) in Colorado, viz, 15 $, 6$, all of which are fresh and 
in the best possible condition. With sufficient material therefore for comparison, 
I am at a loss to see the resemblance between this species and Aglaia. Indeed it 
is not too much to say that they belong to different sections of the genus. They 
constantly differ in size, in the form of the wings, in color, and in the number, 
size and shape of the silver spots. The form of the fore-wings is a distinguishing 
characteristic between species of this genus, and so is the size and shape of the sil- 
ver spots, especially the sub-marginal spots of both wings. Dr. Behr, in his paper 
on Californian Argynnides, Proc. Cal. Acad. Nat. Sci. April 21, 1862, says “of great 
importance for the diagnosis of these specimens is the shape of the marginal 
lunulse.” 
So also does the presence or absence of a clear buff or yellow band between 
the two outer rows of silver spots constitute a highly important distinction, as is 
strikingly exemplified in Gybele and Aphrodite, for which I refer to the plates of 
those species in this Volume. 
As to the species in question, in size, Edwardsii is at least from one third to 
one half the larger in superficial area. As to shape of fore-wings, in the male 
Aglaia, these are broad, strongly arched, not at all produced apically and as nearly 
as possible straight on hind margin. In the female they are distinctly convex 
on hind margin. 
In the male of Edwardsii, the fore-wings are remarkably long, narrow, much 
produced apically, slightly arched and distinctly concave on hind margin. In the 
female the wings are shorter and broader than in the male, hut the margin is 
straight, not rounded. Mr. Reakirt says, “The wings of this species are rela- 
tively more narrow and more elongated than in any member of this genus with 
which I am acquainted.” 
The margin of the hind wing in the female is not circular as in both sexes of 
Aglaia, but the wing is produced so that the outline is oval, and from the anal angle 
to upper median nervule the margin is not curved, but straight. 
In Aglaia, I have seen no specimen with more than the faintest traces of 
sub-marginal silver spots on under side of fore-wings — merely a few silver 
scales — and none of sub-apical silver spots. The figure of Esper represents no 
such spots and that of Humphreys very small marginal lunular spots. West- 
wood, in the description, makes no mention of them. On secondaries the spots 
are small; the third row from the margin consists of three only, and of these 
the middle one is truncated, stopping at the arc; the spots of the second row 
are small and rounded and the sub-marginal are small, narrow, and lunate. 
In Edwardsii, on the fore-wings are seven conspicuous submarginal silver 
triangles and three sub-apical spots, ten in all ; besides these, in fresh specimens, 
two or three of the rounded black spots in the mesial row are always more or less 
silvered. On secondaries are 24 distinct spots. The third row contains five, the 
middle one of which is very large, sub-pyriform, cut by the arc; of the second 
row, six are large, nearly equal in size, sub-ovate; the submarginal are large 
and triangular. In the female all these spots are found, but they are still more 
conspicuous, and the submarginal especially so. 
