50 NEW YORK STATE MUSEUM 



EXPIiANATION OF PliATES 



Plate 11 



1 Beetle, much enlarged 



2 Leaf badly riddled by the beetle 



3 Eggs on last year's wood; the loose bark has been lifted so 



as to expose them 



4 Larva or grub, much enlarged 



5 Work of larva or grub on larger roots 



6 Pupa or •' turtle stage " in cell 



7 Same much enlarged 



Plate 2 



1 Vineyard somewhat injured by Fidia, August 1903 



2 Healthy vineyard with vigorous foliage, August 1903 



Plate 3 



Vineyard badly injured by the grapevine root worm. Observe 

 that very few of the vines extend to the top wire. The wires and 

 posts would ordinarily be concealed in a thrifty vineyard. 



Plate 4 



Vineyard more seriously infested than the preceding. A por- 

 tion of this was uprooted last spring, and the area shown was 

 kept simply for experimental purposes. 



Plate 5 



Portion of two vines represented on the preceding plate and 

 showing how badly the beetles may eat the foliage when abundant. 



Plate 6 

 Leaves from badly eaten vine, illustrating the peculiar, chain- 

 like eaten areas 



Plate 7 



Breeding cages, distant view, showing also the general con- 

 dition of the experimental area, June 1903 



Plate 8 

 Breeding cages, near view, showing general condition of the 

 vines near by, June 1903 



^ Executed from nature under the author's direction by L. H. Joutel. 



