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Introduction. . . . . . . . . . . . . . . i 



The Root-knot Eelworm. Heterodera radicicola. (Illustrated. 3 



Woodlice. Porcellio scaber, Linn., and Oniscus asellus. Linn. 6 



The Black-Currant Gall-Mite. Eriophyes ribis (Nalepa). . . 6 



The Birch Gall-Mite. Eriophyes rudis (Canest.). (Illustrated.) 8 



A Supposed New Apple Mite. Eriophyes, sp. (Illustrated.)., n 



The Pear-Leaf Blister Mite. Eriophyes piri (Pagenst.), Nalepa. n 



The Hazel-Bud Mite. Eriophyes avellaena (Nalepa). . . n 

 Tyroglyphus, sp. on Mushrooms. . . . . . . ..12 



Millipedes. . . . . . . . . . . . . . . . . 12 



The Silver-Fish Insect. Lepisma saccharina, Linn. . . . . 13 



The Froth Fly. Tettigonia spumaria, Linn. . . . . . . 13 



The Apple Sucker. Psylla mali, Forster. (Illustrated.) . . 14 



The Woolly Aphis, Schizoneura lanigera, Hausm. . . . . 16 



The Hop Aphis. Phorodon humuli, Schrank. . . . . . . 16 



The Apple Aphis. Aphis mali, Fabr. . . . . . . 16 



The Rose Aphis. Siphonophora rosae, Reaumur. . . . . 16 



The Camellia Scale. Aspidiotus camelliae, Sign. . . . . 17 



The Rose Scaled nlacas. pis (Diaspis) rosae (Bouche). . . 17 



