HAWK-MOTHS. 43 
The caterpillars consume a very large amount of food, 
and a very few of them are capable of stripping a small vine 
of its foliage in the course of two or three days. They pos- 
sess the additional bad habit of gnawing into the stems of 
the clusters of the grapes, which either wilt or drop off. 
The eggs, which are 0.05 inch in diameter, perfectly 
round, and of a uniform delicate yellowish-green color, hatch 
Fig. 44.—Ampelophaga myron Cram., caterpillar, After Riley. 
into pale green worms with long and straight horns at the 
tails. After feeding from four to five weeks they reach their 
full size, and the horns look now comparatively short, with 
a posterior curve. The full grown (Fig. 44) caterpillar is dis- 
tinguished by having the third and fourth segments immensely 
swollen, while the first and second ones are quite small and 
retractile. According to Prof. Riley it is from this peculiar 
appearance of the fore part of the body, which strikingly 
suggests the fat cheeks and shoulders and small head of a 
blooded hog, that it is known as the ‘‘Hog-caterpillar.”’ 
Perhaps an equally good explanation for having this name 
is the great appetite possessed by such worms. The color 
of a grown caterpillar is pea-green; it is wrinkled trans- 
versely, and covered with numerous pale yellow dots, placed 
