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Scudder's Sulphur
Butterfly.--The male on the upper side is colored like C. philodice, but the black borders are much wider. The fringes are rosy. The is generally white,--very rarely slightly yellow,--with very pale dark borders, or often without any trace of black on the outer margin of the wings. On the under side the apex of the fore wings and the entire surface of the hind wings are greenish-gray. The discal spot of the secondaries is well silvered and margined with pale red. Expanse, 1.80-2.00 inches.
Early Stages.--We know but little of these, except that the caterpillar feeds on the leaves of the huckleberry and the willow.
Scudder's Sulphur is found in Colorado, Utah, Montana, and British Columbia.