. Manual of fruit insects. Fig. 352. — Pupa of the grape-vine flea-beetle. Enlarged. ReferencesComstock, Rept. as U. S. Ent., pp. 213-216. Agr. Exp. Sta. Bull. 157. Y. (Geneva) Agr. Exp. Sta. Bull. 331, pp. 494-514. 1910. 408 FRUIT INSECTS The Grape Leaf-hopper Typhlocyha comes Say The grape leaf-hopper is our most common and widespreadinsect pest of the grape-vine. Practically every vineyard inthe United States and Canada is infested by the insect, and. PiG. 353. — Adults of the grape leaf-hopper. almost every year it occurs in injurious numbers in one or morelocalities.

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. Manual of fruit insects. Fig. 352. — Pupa of the grape-vine flea-beetle. Enlarged. ReferencesComstock, Rept. as U. S. Ent., pp. 213-216. Agr. Exp. Sta. Bull. 157. Y. (Geneva) Agr. Exp. Sta. Bull. 331, pp. 494-514. 1910. 408 FRUIT INSECTS The Grape Leaf-hopper Typhlocyha comes Say The grape leaf-hopper is our most common and widespreadinsect pest of the grape-vine. Practically every vineyard inthe United States and Canada is infested by the insect, and. PiG. 353. — Adults of the grape leaf-hopper. almost every year it occurs in injurious numbers in one or morelocalities. It has its periods of great destructiveness and ofcomparative obscurity, or its ups and downs, like most of ourinsect pests. Serious outbreaks occurred in New York in 1901and 1902, and again in 1911 to 1912. Quaylc states that with theexception of the phylloxera it is the most destructive insect pest of GRAPE INSECTS 409

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