flowers of the oak, as itsparents did, attacks the under sides of the leaves and de-posits its eggs within them, the grubs from which cause theoak spangles (Fig. A, 3, 4). From these are produced, inspring, insects which, like their grandparents (and not theirparents), attack the male blossoms of… … Fig. C—Oak root gall and section. formation of the gall does not commence until the grub ishatched, and that as soon as the grubs (which are furnishedwith sharp jaws) begin feeding a rapid growth of cells round Fig A.—1, Oak leaf with spangle galls and button galls; 2, button galls(magnified); 3,…
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