Report of the Commissioners . Fig. 32. and the other attacking the CD / Y\ir. 33. Fi{;. .W.—HhowinK the inHOct in its different stages of growth ; alrfo a diseased vine root.[3/r. Jiethune.^ INSECTS AND INSECTIVOROUS BIRDS. 43 At first these were thought to be separate species altogether, entirely different asthey are in habits, and differing also in appearance, but Prof. Riley demonstrated, whatliad been suspected by some French entomologists, viz., that they were merely two formsof the same creature, and that the insect had two different modes of life. It has been•enormously destructi
Report of the Commissioners . Fig. 32. and the other attacking the CD / Y\ir. 33. Fi{;. .W.—HhowinK the inHOct in its different stages of growth ; alrfo a diseased vine root.[3/r. Jiethune.^ INSECTS AND INSECTIVOROUS BIRDS. 43 At first these were thought to be separate species altogether, entirely different asthey are in habits, and differing also in appearance, but Prof. Riley demonstrated, whatliad been suspected by some French entomologists, viz., that they were merely two formsof the same creature, and that the insect had two different modes of life. It has been•enormously destructive in France, and has done considerable damage in some parts of theUnited States, but no injury of any account has been traceable to it in Canada. THE- GALL-INHABITING VARIETY. The gall-inhabiting variety is common enough here, but this form of the insect is•comparatively harmless. One peculiarity of this variety is, that they are all females,while those which attack the roots are both winorless females and winged males andfemales. THE ROOT-ASSAILING VARIETY. The
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectagriculture, bookyear
