State Agricultural Society. 
549 
Their color is pale grass green, varying in the depth of its shade 
in different specimens, but always darker green than the pale leaves 
of the cabbage and turnip. They are commonly, but not always 
paler beneath. And they are particularly distinguished by a pale 
yellow line on the back, and a row* of small yellow spots along each 
side. 
When examined with a magnifying glass, tbe suriace of these worms is found to 
be everywhere bearded with fine short whitish hairs, those upon the back shorter, 
and in the young worms black and interspersed with small stiff bristles. These 
hairs arise from numerous minute black elevated points, with which the surface is 
everywhere studded, the larger points being arranged in transverse rows, a row 
upon each of the elevated ridges into which the segments are divided by impressed, 
slender, transverse lines. In addition to these black points, a few pale dots or minute 
warts are more or less perceptible, one appearing on each side of the middle of the 
back, on the second elevated ridge of each segment, another lower down on each 
side, upon the fifth ridge, and some others below these. But on each of the three 
first rings these pale dots are arranged in a single transverse row, on the first elevated 
ridge, three dots on each side, placed equidistant from each other. Along the mid¬ 
dle of the back is a pale yellow line, which is sometimes very faint, or visible only 
on tlie anterior rings. Low down on each side is a row of dots of a brighter yellow 
color than the line on the back, one on each segment, placed a little back of the 
breathing pore, and usually more or less united with the yellow ring around the 
breathing pore. The breathing pores are small, broad oval, dull white, inclosed 
in a black ring, which is bordered with yellow, this border being more broad on 
the fore side and sometimes wanting on the hind side. The head is spheroidal, and 
as broad as the neck, green and clothed with hairs. The legs and prolegs have the 
same green color as the body. 
The most curious feat performed by this insect is the fabricating 
of a little girt or loop in such a manner that it will be around the 
body of the pupa to hold it suspended in an inclined or horizontal 
position. It devolves upon the larva to make this girt and place it 
around its own body in such a manner that when its skin is thrown 
off to enable the pupa to appear, the girt will not be displaced but 
will encircle the pupa in the required manner, as the latter is desti¬ 
tute of any mouth, feet or other members to enable it to make this 
girt or to adjust it in the proper position around its body. The pro¬ 
cess to be gone through with is quite similar to that of suspending the 
arm in a sling fastened around the neck and then drawing the coat 
sleeve from oil the arm without drawing the sling off with it. 
When the worm has become full fed it remains at rest some 
twenty-four hours. It then wanders about until it finds a suitable 
place in which to repose during its pupa state, the under side of a 
rail, a board lying partly elevated from the ground, or other situa¬ 
tion where wet will not penetrate to it. And placing itself in the 
spot it intends to occupy, it again rests for some hours, 
