556 
ANNUAL REPORT OF NEAV-YORK 
on which they first feed, perforating them with round holes 
between the veins. The leaves are also sprinkled over with 
black grains, the excrement of the worms. When not engaged 
in feeding they repose upon the under surface of the leaves or 
upon the leaf stalks, stretched out straight and more slender 
than at other times, showing three or lour fine transverse 
impressed lines at each of the sutures. When crawling it arches 
its back upwards, like a span worm. Dr. Harris is in error in 
saying that it does not suspend itself by a thread. On carefully 
looking at an infested vine, some specimens will almost always 
be noticed hanging down from the leaves. Their attachment 
however is very slight, and on the slightest agitation of the leaf 
the worm lets go its hold and drops to the ground, wriggling 
briskly for a short time after touching the surface. They con¬ 
tinue upon the leaves until the middle of August or later, new 
broods appearing as the old ones vanish. The hops growing 
upon vines thus stripped of their leaves are small and but few 
in number. 
The larva: when yonng are not thicker than a pin and are broadest at the head 
and gradually taper l’rom thence to the tip; they arc watery white, more or less 
clouded with grass green in the middle from inclosed alimentary matter. When 
larger they become of a cylindrical form, strongly constricted at the sutures, and 
are pale green above, commonly showing a deeper green stripe along the middle of 
the back; head and under side greenish white; a white or pale greenish stripe 
along each side of the back, and sometimes a slender whitish line along the middle 
of each side; four black dots above, on each segment, at the angles of an imaginary 
square; five dots upon each side, the upper one above and the next one in the 
lower edge of the slender lateral whitish stripe; each of these dots yielding a hair; 
head with several black dots symmetrically arranged, and on the three next seg¬ 
ments the dots are placed in transverse rows; mouth yellowish, with the tips of the 
jaws black. The legs are but fourteen in number, the prolegs being placed on the 
8th, 9th and 10th of the thirteen segments. 
The worms attain their full size in about a fortnight after they 
hatch from the eggs, and are then an inch or more in length, 
when stretched out in repose. Some of them enter the loose 
dirt slightly, to change to pupa?, others crawl between or beneath 
lumps of dirt, and others merely secrete themselves under or 
partly under leaves lying on the surface of the ground. They 
do not enclose themselves in cocoons, but assume the pupa form 
by throwing off their larva skin. The pupa is half an inch long 
and is at first of a grass green color on its back and greenish- 
white beineath, with a tawny band on the middle of each seg- 
