. Annual report of the Fruit Growers' Association of Ontario, 1902 . ed, the bark becomes discolored, and the leaves and fruit wither,—Pear-Blight Beetle. (Xyleborus pyri). 4. Fixed to Bark : a Flat, or saddle-shaped, or hemispherical dark* brown scales. Large scalesafter mid-summer are brittle and contain only a whitish dust or emptyegg-shells. Wintering forms are small and flattish,—Plum Aaecanium. (Lecanium cerasifex).h Ashy gray appearance of bark of badly infested trees ; small gray, or blackcircular scales,—San Jose scale. (Aspidiotus perniciosus).c Mussel-shaped scales, with whitish egg
. Annual report of the Fruit Growers' Association of Ontario, 1902 . ed, the bark becomes discolored, and the leaves and fruit wither,—Pear-Blight Beetle. (Xyleborus pyri). 4. Fixed to Bark : a Flat, or saddle-shaped, or hemispherical dark* brown scales. Large scalesafter mid-summer are brittle and contain only a whitish dust or emptyegg-shells. Wintering forms are small and flattish,—Plum Aaecanium. (Lecanium cerasifex).h Ashy gray appearance of bark of badly infested trees ; small gray, or blackcircular scales,—San Jose scale. (Aspidiotus perniciosus).c Mussel-shaped scales, with whitish eggs underneath in winter,—Oyster-Shell Bark Louse. (Mytilaspis pomorum).Bark scurfy with white scales, purplish eggs underneath in Bark-Louse (Chionaspis furfurus). d. 110 THE REPORT OF THE No. 19 5. Producing longitudinal slits and eventually oval-shaped Tree-Hopper (Ceresa bubalus).C. Attacking the Leaves :1. Feeding in Colo7iies : a. Protected by webs in the forks of branches. American Tent Caterpillar, (Clisiocampa Americana).. Fig. 91. Limenitis disippus, a. caterpillar; b. chrysalisc. d. larval case. Fig. 92. L. disippus butterfly ; colo-ars orange-red andblack. 6. Protected by webs covering the leaves. Fall fVeb-worm (Hyphantria cunea).c. Not protected by webs, greenish lice with sucking Leaf Aphis (Aphis prunifolii).2. Solitary : a. Measuring worms feeding in the day time and in irorms (Anisopteryx pometaria).
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