300 Report of tiie Department of Entomology of the 

 EXPLANATION OF PLATES. 



Plate IV. — Some Hibernating Places of Grape Leaf-Hoppers. 



Fig. 1, Fence row adjoining vineyard in which " hoppers " were very evident 

 during the Spring of 1912. 



(Photographed May 24, 1912.) 



Fig. 2, Raspberry bushes and rubbish along fence. Height shown by 12-inch 

 rule. 



(Photographed April 10, 1912.) 



Fig. 3, Dead grass which sheltered grape leaf-hoppers. Height shown by 12- 

 inch rule. 



(Photographed April 10, 1912.) 



The last two figures illustrate the small amount of rubbish necessary 

 to shelter these insects. 



Plate V. — Vineyard Surroundings that Make Spring Control of Leaf- 

 Hoppers Difficult. 



Fig. 1, View in vineyard showing grassy headlands and bushes along a dry brook. 

 (Photographed July 17, 1912.) 



Fig. 2, Waste land at edge of vineyard — a favorite retreat for the " hoppers " 

 during winter. 



(Photographed July 15, 1912.) 



Plate VI. — Raspberry Patch, and Grass and Weeds in Swale which Favored 

 Increase of " Hoppers " in Adjoining Vineyards. 



The insects were very abundant in a vineyard behind the camera as 

 well as in the ones shown. 



(Photographed September 17, 1912.) 



Plate VII. — Raspberry (1) and Strawberry (2) Leaves Injured by Feeding of 

 Grape Leaf-Hopper. 

 (Fig. 1, Photographed May 24, 1912; Fig. 2, Photographed May 6, 1912.) 



Plate VIII. — Grape Foliage when Feeding by Grape Leaf-Hoppers Begins; 

 Refuges of "Hoppers." 



Fig. 1, Grape leaf -hoppers begin to migrate from other food plants to the vines 

 when foliage is at the stage shown. 

 (Photographed May 24, 1912.) 

 Fig. 2, Grass strip at edge of vineyard. 

 (Photographed July 8, 1912.) 

 Fig. 3, Weeds adjoining vineyards. 



(Photographed September 12, 1912.) 



The vineyards, Figures 2 and 3, were injured along the borders by leaf- 

 hoppers. 



Plate IX.— Grape Foliage When " Hopper " Migration to Vines is Greatest. 

 (Photographed June 1, 1912.) 



