ther the appearance of the caterpillars, chrysalides, nor the form of the wings in the perfect insect, will fully authorise this, and we have accordingly given another generic designation to the latter.
The antennæ of C. imperialis are reddish-brown; head, thorax, and abdomen yellow, the two latter with various clouds and spots of light reddish-brown with a purple gloss. The upper wings are of a beautiful bright yellow, with several large patches and numerous small rounded spots of reddish-brown glossed with purple sprinkled over the surface; the dark clouds vary somewhat in their size and form, but commonly there is a broad patch occupying the external margin of the wing, from which a curved band runs down the middle and turns forward to the anterior edge near the centre, from which it follows the margin to the base; the whole of the latter is occupied by a large cloud. The ground colour of the hinder wings is likewise bright yellow, with a purplish-brown cloud near the base, a brown eye with a small light spot in its centre on the disk, and beyond that an undulated bar of purple-brown; there are likewise many irregular specks scattered over the surface, most numerous beyond the transverse bar. The under side is of the same bright yellow as the upper, with sprinkled spots of brown, each wing with a reddish-brown eye in the centre, that on the upper wings having a round brown spot above it; all the clouds, however, have disappeared, except that along the exterior and anterior margins. Expansion of the wings from
