Annual report . bo. PLATE 15 Twig badly infested by San Jose scale and showing the numer-ous irregularly circular exit holes of parasites, x 4 Lobe of Cactus showing exudations from wounds caused bythe larvae of the Cactus midge, Itonida opuntiaeFelt Plate 15

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902