This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...is about one sixth inch in length, greenish white in color with the head light brown; the contents of the alimentary canal show through the semitransparent body wall as a greenish or brownish stripe. The larva is legless and only slightly flattened; the constrictions between the segments are rather deep but obtuse; the surface of the body is smooth and clothed with dense, very short, microscopic hairs interspersed with a few larger ones. (Fig. 36.) The mine.--After entering the leaf directly from the underside of the egg, the young larva eats out a narrow linear burrow, or mine, an inch or less in length, leaving the outer layers of the leaf intact. This part of the mine usually follows a tortuous course but may be nearly straight. The larva next enlarges its mine into an irregular ovate blotch about one half inch in length. In the linear part of the mine the excrement is left as a blackish streak extending along the center of the burrow; in the blotch mine it forms a broad, irregular band along the center, but does not extend to the tip. The outer leaf layers overlying the mines turn brownish or yellowish; the upper layer seems to be thinner than the lower, and the mines are more conspicuous when viewed from above. There are often ten or a dozen mines in a single leaf. (Figs. 27 and 28.) The cocoon.--When full grown the larva leaves the mine through a cut in the upper surface of the leaf, falls to the ground, and there constructs a small flattened brownish cocoon in cracks in the soil, under loose stones, or between the base of the tree and the surrounding soil. Where the ground is undisturbed, the cocoons are rarely found more than an inch below the surface. Sod furnishes ideal winter quarters for the cocoons. In Fig. 26 is shown the method of cultivation...