INSECTS INJURING OAK-LEAVES. 127 
170. The rosy-striped oak-worm. 
Anisota peUucida Hiibner. 
Order Lepidoptera; family Bombycid^e. 
Eating the leaves in July, in New York, a two-horned prickly worm of an obscure 
gray or greenish color, with dull brownish-yellow or rosy stripes, and its skin rough 
from white granules. 
This species has been said by Fitch to have been common for many 
years in Salem, N. Y., where A. stigma has seldom been seen The worms 
mostly enter the ground to transform into the pupa early in August, 
though some remain on the trees as late as the middle of September. 
The following description is copied from Prof. G. H. French's Report 
of the Curator of the Museum of the Southern Illinois Normal Uni- 
versity, 1880. They occurred on different species of oak' during the 
middle and last of September, most of them pupating by October 2 in 
the soil. 
Larva. — Length about 1.25 inches. General color pale dull green, striped with fine 
red substigmatal, subdorsal, and dorsal stripes, the last very pale, so as to be almost 
obsolete. Head with a slightly yellowish tinge. On each segment there are six 
short black thorns or sharp points, the two on the back of the second segment behind 
the head being about one-fourth inch long, but the rest much shorter. 
We add also the following description furnished by Dr. Riley, who 
has compared it with the caterpillar of Anisota stigma : 
A. peUucida comes nearest to A. stigma in general appearance, but the spines are 
shorter, more pointed, uniformly black; the color is darker, being almost black, so 
that the papillae, which are ratber denser, give the dark portion a bluish cast ; the 
subdorsal and stigmatal lines are of a more intense red, inclining to pink, and the 
stigmatal line is rather broader than the subdorsal. The average length is somewhat 
less and the larva more slender than in stigma; the shorter, blacker spines, deeper 
colors, and stronger contrast between the lines at once separating it from stigma.* 
Specimens, without much doubt belonging to this species, though we 
have not found the moth in Maine, occurred on the red oak at Bruns- 
wick, Me., August 28. The body was greenish, with dark dorsal and 
lateral, not ** reddish," bands. 
Moth. — Besides being smaller, the male differs from those of A. stigma and senatoria 
in the hind wings being distinctly triangular, the outer edge being straight and the 
hind angle somewhat produced; the fore wings are also decidedly narrower, while 
the white discal spot is considerably larger, and the wings are throughout consider- 
ably darker and free from dark spots. Expanse of wings of male, 40 ,mn . 
* Found ou differeut kinds of oak, October 2, 1873, many larvae looking like A. 
stigma. The form is the same, but they differ considerably from them in color and 
markings. It is to be distinguished from A. stigma in its smaller size, in the ground 
color of the dark parts being blacker, the papillae being yellow instead of white, and in 
the paler vittae being of a deep pink or lake-red. The head and anal shield are more 
olivaceous and the spines are shorter and stouter. The whole larva is more brightly 
.and distinctly marked. Moths issued April 22, 1874. 
Some of the dried larva skins were brought from Loudoun County, Va., in July, 
1881. (Riley's unpublished notes). 
