Home › Volumes › Butterflies › Nymphs
Colon
Butterfly.--Of the same size and general appearance as M. chalcedon, with which I believe it to be identical, the only possible satisfactory mark of distinction which I am able to discover on comparing the types with a long series of chalcedon being the reduced size of the marginal row of yellow spots on the upper side of the primaries, which in one of the types figured in the plate are almost obsolete. They appear, however, in other specimens labeled "Type." The learned author of the species lays stress, in his original description, upon the shape of the spots composing the band of spots second from the margin on the under side of the hind wings; but I find that the same points he dwells upon as diacritic of this species are apparent in many specimens of what undoubtedly are chalcedon. Expanse, 1.75-2.50 inches.
Early Stages.--These have not been recorded.
The types came from the region of the Columbia River, in Washington and Oregon.