326 LEPIDOPTERA. 



and is of a light olive color, variegated with patches of dark- 

 er olive. The Acltemon (Plate V. Fig. 3 ; Fig. 151, pupa) 

 rl 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, not 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 Acliemon 

 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 beino; very lar^e 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 CJioero- 

 eampa, 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.) 



