CARPENTER-MOTHS. 149 
The caterpillar lives in the trunk and larger limbs of the 
infested trees. It has a pale greenish-white body with a 
tinge of pink or yellow; sometimes a reddish-pink band 
occurs on the anterior part of each segment, except the third 
or fourth and the last one. It has a dark colored dorsal 
line; segments two and three have a brown spot on the top, 
and on each side of segments four to eleven inclusive are 
three piliferous spots above the spiracle, arranged in the 
form of a triangle. These piliferous spots are brown or 
pink. The under side of the caterpillar is greenish-white, 
the cervical shield dark or yellowish-brown; the head dark 
brown, with a somewhat lighter colored face; the jaws are 
stout, prominent and pitchy. These large and bad smelling 
worms reach a length of about two inches and a half. When 
full grown they spin a loose cocoon in the burrow, inside of 
which they transform to a rather slender, cylindrical pupa, 
which is furnished with a series of spines around the edges 
ofeach segment. When ready to emerge as a moth the pupa 
twists and wriggles through the bark, and for half its length 
out into the open, holding fast by the spines on the abdom- 
inal segments. The larve live in the trunk of trees about 
three years before coming to maturity. The moth issues 
late in June or early in July. 
The two sexes of the moth differ both in size and in 
color. The female, which expands from two to two and a 
half inches, has gray wings marked with irregular black 
lines and dots. The male, which expands only an inch and 
a half, has the fore-wings much darker, and the hind-wings 
are golden or ochre-yellow. There are but few scales upon 
the wings of these moths. 
The eggs are deposited in the crevices of the bark about 
the first of July, and usually older trees are selected for this 
purpose. The large eggs are glued so tightly to the surface 
that they can not be removed without destroying them, and 
yet they are still so soft when just deposited that they fit 
any crack, no matter what its shape. Several hundreds of 
