. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 588 Div. 3. ARTICULATA.—INSECTA. Class ^^^ Fig. 003.—Oak gaU-apple and Cynips quercusfolii. made in various vegetal)les in order to deposit its eggs; the fluid accumulating in the wounded part of the plant forms excrescences or tumours, which have been termed galls or nut-galls, the latter of which is employed with a solution of green vitriol, or sulphate of iron, in producing a black dye. The form and solidity of these galls vary according to t
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. 588 Div. 3. ARTICULATA.—INSECTA. Class ^^^ Fig. 003.—Oak gaU-apple and Cynips quercusfolii. made in various vegetal)les in order to deposit its eggs; the fluid accumulating in the wounded part of the plant forms excrescences or tumours, which have been termed galls or nut-galls, the latter of which is employed with a solution of green vitriol, or sulphate of iron, in producing a black dye. The form and solidity of these galls vary according to the nature of the parts of the plants which have been attacked, as the leaves, petioles, buds, bark, roots. Many are spherical, and resemble fruits, such as gall-apples, &c.; others are hairy, as the bedeguar of the rose; others resemble small artichokes, fungi, &c. The eggs inclosed in these galls increase in size and con- sistence. They give birth to small larvae destitute of feet, but furnished with tubercles to supply their stead ; sometimes they live singly, and sometimes in societies. [ I have obtained Jnore than eleven hundred gall-flies from a single gall, found at the root of an oak]. They devour the inte- rior without stopping its growth, and remain five or six months ia that state. Some undergo their changes within the galls, but others quit them in order to descend into the earth. The small round holes observed in the sides of the galls, show that the insect has made its escape: various insects of the following family are also found within, but these have taken the place of the real inhabitants, having destroyed them in the same manner as the Ichneumohs. An insect [considered to belong to this family] deposits its eggs in the seeds of tbe most forward ^ild figs in the Levant. The modern Greeks, following a custom handed down to them by their forefathers, fasten several of these fruits, atoongst the later figs, the insects escaping from which, covered vrit
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Keywords: ., bookauthorwe, bookcentury1800, bookdecade1860, booksubjectzoology
