. The American entomologist. Entomology. Entered, according to Act of Congress, in the year 1880, by the HUB PUBLISHING Co. of N. Y-, in the office of the Librarian of Congress at Washington. ,^E\ NEW YORK, AUGUST, 1880. NO. 8. PUBLISHED MONTHLY BY THE HUB PUBLISHING CO. of n. y. 323 Peapl St., New York. TERMS Two dollars per annum, in advance. EDITORS : CHAS. V. RILEY, Editor Washington, D. C. A. S. FULLER, Assistant Editor, Ridgewood, N. J. THE GRAPEVINE FLEA-BEETLE (Graptodera chalybea Illig.). Of the numerous insect enemies with which our grape-growers have to deal, the
. The American entomologist. Entomology. Entered, according to Act of Congress, in the year 1880, by the HUB PUBLISHING Co. of N. Y-, in the office of the Librarian of Congress at Washington. ,^E\ NEW YORK, AUGUST, 1880. NO. 8. PUBLISHED MONTHLY BY THE HUB PUBLISHING CO. of n. y. 323 Peapl St., New York. TERMS Two dollars per annum, in advance. EDITORS : CHAS. V. RILEY, Editor Washington, D. C. A. S. FULLER, Assistant Editor, Ridgewood, N. J. THE GRAPEVINE FLEA-BEETLE (Graptodera chalybea Illig.). Of the numerous insect enemies with which our grape-growers have to deal, the object of this sketch occupies an important place. The numerous complaints we have [Fig. 86.] Ft k. Grafevine Flea-Beetle :—rt, leaf, with larvse natural size; ^, larva, enlarged ; c, cocoon ; f/, beetle, the swollen hind thighs not shown {after Riley). received this year of its ravages show that it has been more than usually abundant. The beetles which have hibernated begin their destructive work in the spring as soon as the buds commence to swell, and it is at this early period that the greatest damage is done by the beetles boring into and feeding on said buds. Later in the season the beetles feed upon the leaves, and upon these, in the month of May, the female lays her small orange-colored eggs in clusters. These soon hatch, and the young dark- colored larvse soon riddle the leaf, as shown in our figure (86, a), or when very numerous completely devour it, leaving only the largest ribs. In about a month the full-grown larvae (Fig. 86, 6) descend into the ground, where each forms a small earthen cell (Fig. 86,c), and changes to a dull yellowish pupa of the shape normally assumed in this family. The perfect beetle issues about three weeks later, from the middle of June to the middle of July, and again begins to eat the leaves, but the damage done to them is trifling compared with that done in early spring. So far as we have observed there is but one annual generation, but i
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