INSECTS INJURIOUS TO THE OAK. 45 
40, THE ORANGE-STRIPED OAK-WORM. 
Anisota senatoria Hiibner. 
Order LEPIDOPTERA; family BOMBYCID&. 
In August, sometimes stripping the trees, a spiny black caterpillar, with four orange- 
yellow stripes on the back and two along each side, with two black prickles above and 
two on each side, changing the following June to a large ocher-yellow moth, with a 
large white dot on the fore wings. 
These prickly caterpillars, during certain years, as [ have noticed at 
Amherst, Mass., so abound as to nearly strip large oak branches of their 
leaves, and is perhaps the most destructive of all our caterpillars to the 
foliage of the oak. The spines, if they happen to penetrate the skin, as 
Fitch and others have observed, sting like nettles. This species is the 
more injurious in the Northern States, while A. stigma is most destruct- 
ive in the Southern, Mr. Riley informs me. According to Riley, Mr. 
Bassett has bred a small ichneumon fly (Limneria (Banchus) fugitiva 
Say) from this caterpillar. Riley has also bred it from the larva of 
Anisota stigma, as well as other caterpillars. 
41. THE SPECKLED SPINY OAK-WORM. 
Anisota stigma Hiibner. 
Eating the leaves in September, in the Southern States especially, a worm like the 
preceding, but of a bright tawny or orange color, with a dusky stripe along the back 
-and dusky bands along the sides, and with its prickles lengthened into thorn-like 
points. 
This worm is said by Mr. Riley to be nearly as destructive in the 
Southern States as A. senatoria is in the Northern. 
Full-grown larva.—Average length, 50™™. General color pale tawny-red, inclining to 
orange. The whole surface covered with bright yellow, almost white papille of dif- 
ferent sizes, giving a speckled appearance; the usual medio-dorsal narrow line; a broad 
subdorsal longitudinal stripe of a paler color and having a dingy carneous hue; a 
narrower sub-stigmatal stripe of the same hue. Horns and spines black and marked 
with white papille, and with a tendency to branch, especially toward the tips; the 
longer horns on joint 2 being blunt-pointed, and also with white papille at the base. 
Head uniformly gamboge-yellow; cervical shield, anal plate, and plates on anal pro- 
legs of the same yellowish color as head. A pale medio-ventral line; the thoracic 
legs pale, the prolegs with pale papille outside on a dark ground. 
The species is at once distinguished from the other species of the genus by the longer 
spines, their tendency to furcation and being speckled with white papille, and by 
the less distinct striping. (Riley.) 
42, THE ROSEY-STRIPED OAK-WORM. 
Anisota pellucida Hiibner. 
Order LEPIDOPTERA; family BOMBYCID%. 
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 granulés. 
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 
