Contents, 



PAGE 



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



The Stem Eel worm. Tylenchus devastatrix, Kuhn. ... 3 



White Worms. Fvidericia ley dig i, Vej 4 



Woodlice. 4 



The Black-Currant Gall-Mite. Eriophyes ribes (Nalepa). ... 5 



The Walnut Gall- Mite. Eriophyes tristriatus v. erinea (Nalepa). 



(Illustrated.)... 8 



The Hazel Bud Mite. Eriophyes avellaena (Nalepa) 8 



The Lime Leaf Gall-Mite. Eriophyes tiliae (Pgst.), Nalepa. ... 8 



Springtails. Collembola. ... ... ... ... ... ... 10 



The Earwig. Forficula auricularia, Linn. ... ... ... ... n 



The Book Louse. Atropos divinatona, Fabr u 



The Pea and Bean Thrips. Thnps pissivora ... 12 



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



The Apple Sucker. Psylla malt, Forster.... ... 14 



The Larch and Spruce Chermes. Chermes abietis, Linn. 



(Illustrated.) 14 



The Woolly Aphis. Schizoneuva lanigera, Hausm. (Illustrated.) 17 



Plum Aphids. Aphis pruni, Reaumur, and Hyalopterus pruni 



(Fabr.). (Illustrated.) 18 



