New York AGRICULTURAL ExPERIMENT STATION. 373 
the back its entire length, and commencing upon the second or the base 
of the first segment back of the head. In this stripe are numerous minute 
black dots. On each side of it are a number of short, crinkled, irregular 
longitudinal lines, of a yellow color, which become paler down upon the 
sides. Above the lowermost series of these lines is a row of transverse 
oval pale blue spots, one upon the middle of each segment. On the an- 
terior side of each of these spots is a broader deep velvety black spot, 
as it appears to the naked eye, forward of which is a rather faint pale 
blue oblong spot or short stripe, reaching to the anterior margin of the 
segment. Lower down, the sides are mottled with the same tint of pale 
blue coloring, interspersed with short, crinkled pale yellow or whitish 
lines. The under sides of the body and legs are black, the soles of the 
prolegs white. The neck or anterior edge of the segment next to the 
head is also white, with two small, somewhat square, yellow spots above. 
The tent.— The tent or nest (Plate XXXII) is built in any 
convenient angle of the limbs. It is composed of successive sheets 
of silk stretched across from limb to limb and is enlarged from 
time to time to suit the needs of the growing occupants. Access 
is had to the interior by irregular openings.in the silk. The silk 
is coarse and sufficiently strong to resist even severe wind and rain 
storms. As previously stated only the caterpillars from a single 
ege-cluster usually build and occupy the same nest. There are 
undoubtedly exceptions to this rule. The writer observed a case 
last season where two colonies of caterpillars, the egg-clusters from 
which they hatched being near together on the same twig, built 
and occupied one nest together. 
Pupation.— Toward the latter part of May the caterpillars are 
ready to pupate. At this time they may be found crawling down 
the trunks of the trees or wandering about on the ground in 
search of places to spin their cocoons. The cocoons average 
about an inch in length and are oval in shape. They are com- 
posed of strands of course white silk woven loosely and intermixed 
with a saffron yellow powder. Some of the hair from the cater- 
pillar’s body may sometimes be found interwoven with the silk. 
Some of the cocoons are thin and flimsy, while others are more 
closely woven. 
The cocoons are placed in any convenient location, sometimes 
singly or together in numbers. They may be found upon the 
