. First[-ninth] annual report on the noxious, beneficial and other insects, of the state of Missouri, made to the State board of agriculture, pursuant to an appropriation for this purpose from the Legislature of the state . 62 SIXTH ANNUAL REPORT. The enemies known to attack the Phylloxera under-ground are,*naturally enough, fewer in number. In one instance I have found aScyranus larva at the work six inches below the surface, and there is aSyrphus fly {PipLia radicimi, W. & Ii.,Fig. 15), whose larva lives un-der-ground and feeds both on the Apple-tree Root-louse, and on thisGrape lioot-louse.

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. First[-ninth] annual report on the noxious, beneficial and other insects, of the state of Missouri, made to the State board of agriculture, pursuant to an appropriation for this purpose from the Legislature of the state . 62 SIXTH ANNUAL REPORT. The enemies known to attack the Phylloxera under-ground are,*naturally enough, fewer in number. In one instance I have found aScyranus larva at the work six inches below the surface, and there is aSyrphus fly {PipLia radicimi, W. & Ii.,Fig. 15), whose larva lives un-der-ground and feeds both on the Apple-tree Root-louse, and on thisGrape lioot-louse. Wonderful indeed is the instinct which teaches thisblind larva to penetrate the soil in search of its prey; for the egg mustnecessarily be laid at the surface. But though the under-ground ene-mies of its own class are few, I have discovered a mite which preys?extensively upon this root-inhabiting type, and which renders efficientf^^^- ^^1 aid in keeping it in check in this country. Y^hi^-miie {T>/roglypJiusfphylloxercGy Planchon & Riley,) belongs to the same genus (17)as the cheese and meal mites{T. siro Zi7in.), and the species(T. entomopliagu^ Laboulbene)which infests preserved insects and Boot-louse Syrpiius-fly: o,

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Keywords: ., bookcentury1800, bookdecade1860, booksubjectb, booksubjectinsects