THE ZEBRA CATERPILLAR. 451 
as a British species, under the name of Hadena arnica , or 
the barred arches-moth. The wings of this moth expand 
an inch and three quarters, or more, and are proportionally 
broader than those of the cut-worm moths. The general 
color of the fore wings, as already stated, is deep Spanish- 
brown, variegated with gray. The small ordinary oval 
spot is marked by a gray border. The kidney-spot is large, 
gray, and very conspicuous. There is a broad wavy band 
of a pearl-gray or blue-gray color near the outer hind mar- 
gin, and a narrow wavy band between the oval spot and 
shoulder. The hind wings are pale ash-colored, shaded 
behind with brown, having a pale border, and a distinct 
central blackish spot beneath. The head and thorax are 
dark brown ; the collar and tips of the shoulder-covers are 
edged with rust-red ; and the hind body is ash-colored or 
pale brown, with a row of four rust-red tufts upon it. This 
common moth belongs to the same group or family as the 
following species, though differing therefrom in its caterpillar 
state. 
There is another naked caterpillar (Fig. 22C) which is 
often found to be injurious 
to cabbages, cauliflowers, 
spinach, beets, and other 
garden vegetables with sue- 
culent leaves. It does not conceal itself in the ground, but 
lives exposed on the leaves of the plants which it devours. 
When disturbed, it coils its body spirally. It is of a light 
yellow color, with three broad, longitudinal, black stripes, 
one on each side and the third on the top of the back ; and 
the head, belly, and feet are tawny. The lateral black 
stripe is worthy of attentive examination. It consists of 
numerous transverse black marks somewhat like Runic let- 
ters, on a pure white ground ; but the white ground, when 
seen without a glass, seems blue, by contrast with the black 
characters. Dr. Melsheimer calls this the zebra caterpillar, 
on account of its stripes. It comes to its full size here in 
Fig. 223 
