DESCRIPTION. 
19 
and properly sprayed vineyards are less subject to the attacks of 
insects. Such infestations are very frequently the direct outcome of 
neglect in the general care of vineyards, as is more fully considered 
elsewhere in this bulletin. 
DESCRIPTION. 
THE EGG. 
(PI. I, figs. 3-4.) 
The eggs of the grape 
root-worm beetle are small 
yellowish - whit e objects, 
measuring 1.15 mm. in 
length and are about one- 
third as broad as long. In 
form the egg is cylindrical, with the two ends almost hemispherical. 
As the shell is very flexible and the eggs are generally laid crosswise 
on the canes, they often assume a slightly curved shape. Through 
the semitransparent shell the segmentation of the embryo can be 
seen, and later, as the young larva attains its full development, the 
Fig. 8.— The grape root-worm {Fidia viticida). Larva: a, 
Side view of full-grown larva: b, front view of head; c, 
maxillae and labium. Much enlarged. (Original.) 
Fig. 9.— The grape root-worm. Pupa: a, Upper view. 6, lower view; C, normal position of pupa in 
cell; c, d, showing the pupa supported by the spines in the cell; e, hind part of body, showing 
terminal spines. Much enlarged. (Original.) 
head with the dark-colored mandibles becomes clearly visible. Prof. 
F. M. Webster observed the larva backing out from the eggshell in 
the process of hatching. 
THE LARVA. 
(PI. I, figs. 5-6; text fig. S.) 
The full-grown larva varies in length from S to ID mm. It is 
whitish, with the head, thoracic shield, and spiracles pale brown. 
