CAT0CALA NEOGAMA. 
203 
portion of their body when walking, after the man- 
ner of the geometer caterpillars, thus indicating an 
affinity, and forming a passage from the Noctuid® 
to the Geometrid®. The caterpillars generally feed 
on a great variety of plants. The chrysalides are 
often remarkable for their fine lilac or bluish colour, 
appearing as if covered by a kind of bloom. 
Expansion of the wings, in C. neogama, about 
three inches two lines. Head and thorax grey, the 
latter with transverse dark lines in front. Upper 
wings variegated with brown, ash-grey, and white, 
and marked with numerous flexuose black lines, 
most of them running obliquely across the wings ; 
there is an ear-shaped spot in the centre, and a pretty 
regular series of small dark spots not far from the 
exterior margin. Hinder wings yellow, each with 
two black bands, irregular on their edges, and nei- 
ther reaching to the abdominal margin, the exterior 
one broadest, and the other not recurved ; abdomen 
yellow. 
The caterpillar (Plate XXVI. fig. 2) is reddish- 
brown, with two darker lines near the back, and a 
series of dark spots along the sides. It feeds on the 
black American walnut ( Juglans nigra, Linn.), and 
like others of its tribe, when done feeding, it de- 
scends from the leaves to the body of the tree, and 
stretches itself along the bark, to which it bears so 
much resemblance in colour and surface, as to be 
scarcely distinguishable from it. The perfect insect 
appears in June, and is found in Georgia and other 
parts of America. 
