A2 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
The following descriptions of larva, chrysalis, and cocoon of this moth 
is copied from Mr. Henry Edwards’s account in the Proceedings of the 
California Academy of Sciences, vol. v, 1874, p. 368. 
Larva.—Head slate-gray, with black spots; mouth-parts black, tipped with dull 
yellow. Body slate-gray, covered laterally with fine black speckles. Along the middle 
of the dorsal region is an irregular black stripe, marked on its sides with waved orange 
lines, and surmounted at the union of the segments by a double tuft of chestnut- 
brown hairs. On the second and third segments, in the middle of the notched black 
line, is a stripe of dull white. From the base of the orange-brown tufts spring a few 
scattered black hairs, longest anteriorly, and from the forepart of each segment arise 
lateral tufts of white hairs. The stigmata are orange, with black central points. 
Above the base of the feet is a black interrupted line, out of which spring other white 
hairs, irregularly disposed. Under side dull velvety black, with the anterior portion 
of each segment whitish. Feet and prolegs black, yellow at their tips. Length 1.85 
inches. Food-plant, Quercus sonomensis Benth. 
The larva is frequently attacked by a species of Ichneumon, the eggs of which are 
visible on the head and anterior segments. 
Chrysalis—Chestnut-brown, with few hairs along the base of each segment. 
Cocoon.—Ovo-lanceolate, very silky, yellowish white, with some portions glued in 
compact mass, and whiter than the remainder. Chrysalis only imperfectly seen 
through the web. Larva May 22, changed to chrysalis May 29. Imago, June 16. 
The caterpillar of a species of Clisiocampa, which differs from the 
two Californian species just described and from the eastern ones, the 
moth of which we did not obtain, was abundant at Virginia City and 
Helena, Mont., on the leaves of the wild rose so common near those towns, 
its conspicuous tents readily attracting the eye. <A half-grown larva, 
found, June 16, at Virginia City, measuring 0.75 inch in length, had a blue- 
black head. The body was blue on the sides, with dark spots; a black 
subdorsal spot rudely resembling a St. George’s cross occurred on each 
side of each ring. The median dorsal line is pale blue, interrupted by 
the sutures between the segments. On each side of the line is a brown 
ochreous patch. The hairs are ochreous brown; the long ones paler. 
When fully grown it is about the size of the Eastern tent-caterpillar (C, 
americana), i. é., an inch and a half. The mature larva found at Helena, 
June 21, was described from life in my notes, as follows: 
Head grayish brown; body pale, grayish-blue on the sides, speckled with black, 
with a large black squarish patch, extending above into the subdorsal broad longi- 
tudinal band, which is mottled with bright ochreous brown, short wavy lines. <A pale 
bluish distinct longitudinal broad median dorsal stripe interrupted by the sutures 
between the segments. Hairs long, pale brown. Body blackish beneath. 
At this date the caterpillars had begun to be full ted, and one cater- 
pillar had spun a cocoon under a stone. 
This caterpillar differs from that of C. americana in having a broad 
blue dorsal stripe instead of a white one, and there is no broad longitu- 
dinal black stripe, as in the Eastern caterpillar. The moth probably 
differs from any of the Pacific coast species, the larva being quite unlike 
that of Clisiocampa californica Pack., which is closely allied to C. ameri- 
cana. It also differs decidedly from the ecaterpiilar of C. constricta 
Stretch, the dorsal stripe being blue instead of black. 
