REPORT OF COMMITTEE ON PUBLICATION 



205 



Fig. 2. 



(a) Eggs of the Flea Beetle (enlarged about six times). 



(b) Typical injury to the vine bud (somewhat enlarged). 



feed upon the foliage, eating irregular holes in it. (Fig. 3.) The greatest 

 injury by the beetles is done during May and early June. After June 10th 

 the foliage has advanced so as to suffer little from the feeding. About this 

 time also the adults begin to die. By July 1st few of the adults remain. 



Description of the Insect. 



Egg. The eggs of the grapevine flea-beetle are small orange or saffron 

 colored bodies of a cylindrical shape, having the ends almost hemispherical 

 (Fig. 2a). They vary considerably in size. In 1913, 227 eggs were measured and 

 were found to have a mean length of 1.03 m.m. (.04 inch) and a mean diameter 

 of .42 m.m. (0.165 inch). The range in length was from .76 to 1.22 m.m. (.03 

 to .048 inch) while the range in diameter was from .3 to .54 m.m. (.012 to .021 

 inch). The outer covering of the eggs has a uniformity roughened appear- 

 ance due to small depressions found over the entire surface. If this coating 

 be removed, the inner coating of the egg is seen as an almost transparent 

 membraneous covering and the egg has a light yellow color. These two layers 

 are frequently seen on eggs for in lifting the bark to examine them the outer 

 covering is often ruptured. 



Larva. When the larva is in the first instar (i. e. between hatching and 

 the first moult) it is dark brown and the head is very large in proportion to 

 its body. The body tapers gradually to the anal segment and is covered with 



