e artichoke galls (Fig of sheath, and the actual instrument which is used for pierc- fully formed its growth is arrested. The life history of the D), become quite hard and almost woody: others, like’ the ing the buds, etc., and placing the eggs at the bottom of the gall fly is most interesting. Dr.… … species placing itseggs in a different layer of cells to the one of the scales, and thrusts it, working the hair-like or- Fig. E.—Oak apple gall; 2, ditto, section. gans up and down, like saws, into the bud, until the posi- other. A question which has been much discussed among tion is reached which…
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