C U L T U I! E OF THE GRAPE. 263 



Another Sphinx caterpillar {Chmrocampa, or Hoy 

 Caterpillar), smaller and more numerous, though solitary 

 in its habits, like the preceding, is much more destructive. 

 Eating the leaves as it descends the stem, it also nips 

 off the half-grown grapes in great quantities, and allows 

 them to fall to the ground. It receives its name from the 

 resemblance of the fore-part of the body to the head 

 and snout of a hog. Its color is pale green, sometimes 

 brown, with orange-colored spots on the back, six or seven 

 darker lines on each side, and a horn at the hinder ex- 

 tremity. It descends to the ground in August, and forms 

 a partial cocoon under the leaves ; and the small winged 

 moth appears in the following July. 



Besides the Sphinx caterpillars, there are other species 

 which feed upon the vine. The common Blue Caterpillar, 

 which produces the delicately colored and very beautiful 

 small moth Eudryas grata (beautiful wood-nymph), 

 is often found, solitary but inconsiderable numbers, feed- 

 ing upon the vine -leaves. When fully grown, it measures 

 an inch and a quarter, stretching to an inch and a half, in 

 length; its color being blue with deep orange bands, dot- 

 ted with black across the middle of each ring. They first 

 appear about the middle of July, and, when not feeding, 

 may be found on the under side of the leaves, until they 



