A single specimen of the larva of this insect was taken crawling on a fence on the 1st of October, 1866. It must be very rare in this locality, as I had never seen it before, nor have I observed it since, nor ever captured a specimen of the imago, which is very handsome. Food plant unknown. Length 1.20 in., cylindrical. Head medium sized, rather flat, slightly bilobed, of a pale greenish-white color, with a large patch of black on each lobe above and a smaller one below just above mandibles. Mandibles black, with a stroak of white on each. Body above pale greenish-white, semi-transparent, with transverse rows of tubercles of the same color, from which arise tufts of long, fine, silky, white hairs.