CERATOCAMPA IMPERIALIS. 159 



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 antennae 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 yel- 

 low, 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 



