326 
LEPIDOPTERA. 
and is of a light olive color, variegated with patches of dark- 
er olive. The Achemon (Plate V. Fig. 3 ; Fig. 151, pupa) 
expands from three to four 
inches, is of a reddish ash- 
color, with two triangular 
patches of deep brown on 
the thorax, and two square 
ones on each fore wing ; the hind wings are pink, with a 
deeper red spot near the middle, and a broad ash-colored 
border behind. 
The grape-vine suffers still more severely from the rav- 
ages of another kind of Sphinx caterpillars, smaller in size 
than the preceding, and like them solitary in their habits, 
but more numerous, and, riot content with eating the leaves 
alone, in their progress from leaf to leaf down the stem, 
they stop at every cluster of fruit, and, either from stupidity 
or disappointment, nip off the stalks of the half-grown grapes, 
and allow them to fall to the ground untasted. I have 
gathered under a single vine above a quart of unripe grapes 
thus detached during one night by these caterpillars. 
They are naked and fleshy, like those of the Achemon 
and Satellitia, and are generally of a pale green color 
(sometimes, however, brown), with a row of orange-colored 
spots on the top of the back, six or seven oblique darker 
green or brown lines on each side, and a short spine or horn 
on the hinder extremity. The head is very small, and, with 
the fore part of the body, is somewhat retractile, but not so 
completely as in the two preceding species. The fourth and 
fifth segments being very large and swollen, while the three 
anterior segments taper abruptly to the head, the fore part 
of the body presents a resemblance to the head and snout 
of a hog. This suggested the generical name of Choero- 
carnpa, or hog-caterpillar, which has been applied to some 
of these insects. (Fig. 152, caterpillar covered with cocoons 
of a parasitic Hymenopterous insect ; Fig. 153, the parasite, 
natural size and magnified.) 
* 
