Report of Entomologist. 
357 
Those worms are slender cylindrical, and grow to nearly or quite three-fourths of 
an inch in length. The surface of their bodies is smooth and without any raised 
points or ridges. Like other measure worms they have only five pairs of feet, one 
pair at the tip and another pah* a little forward of these, being thick prolegs, and 
.hroe pairs of slender true legs upon the breast. Some short fine erect hairs are scat¬ 
tered over the surface, arising from black dots. Aloqg the middle of the back is a 
pale livid greenish stripe, bordered on each side by a rather thick whitish line, out¬ 
side of which is a paler lurid greenish stripe of similar width to that on the middle 
of the back and having in it two black dots upon each segment, and on its outer edge 
a whitish line similar to that on its inner edge. Outside of this whitish line, along 
each side of the back, is a very dark green stripe, of the same width with the paler 
green ones inside of it,- and having along its outer edge a yellowish white line. 
Below this line the sides are pale greenish yellow, with a slender yellowish white 
stripe upon an elevated ridge of the skin, there being on each segment two black dots 
above this stripe, the anterior dot being the breathing pore, which, more highly mag¬ 
nified, is seen to be a minute yellow dot inclosed in a black ring. There is also a 
black dot in this stripe and two below it, these last being usually margined with a 
yellowish white rjng. Directly below the hind one of the dots last mentioned is 
another black dot placed in a slender broken faint yellowish white stripe. And for¬ 
ward of this dot is another, and below this still another, on the under side of the body. 
On the hind end of the back is a semicircular black spot; and there is a large black 
dot on the base of each of.the hindmost legs. These thick prolegs are glossy, and of 
a pale yellowish and watery color. 
These measure worms eompleted their growth on different days 
early in August, and then descended to the ground, crawling under 
dead fallen leaves and other rubbish, where they spun a few fine 
threads like cobweb upon the ground over and around them. They 
here cast their skins and appeared in their pupa form, usually having 
the small slender two-parted hook at the end of their bodies fastened 
into some of the cobweb threads. The pupa is glossy and of a bright 
chestnut brown color, its surface minutely wrinkled and with the 
abdominal segments coarsely punctured. It is 0.40 long and 0.12 
thick. In this pupa state the insect remains through the winter. 
In Europe these moths are stated to make their appearance the last 
of June, and this is the time I met with them in former years. But 
for six years past my specimens have all been captured nearly a 
month later, on the 20th of July, or within two days of that date; 
and seven moths reared in cages all came out upon the 18th of July 
and the three following days. 
The moths measure 1.35 to 1.50 across their extended wings. They are ash-gray, 
varied with blackish markings and bands on the abdomen. The wings are all 
occupied from their bases to the extremity with numerous transverse lines or stripes, 
which are alternately ash-gray and blackish, fading to brown in specimens long 
preserved. These lines are wavy and frequently zigzag in places, forming right 
angles at each bend. On the fore wings, the number of blackish lines is usually 
sixteen. In some specimens these lines are quite uniform from the base to the hind 
