. Elements of comparative zoology. Zoology. INSECTS. 263 cies which have a cocoon the silken threads are softened by fluids secreted by the imago, and in some there are hooks at the bases of the wings which aid in tearing an opening for the escape of the moth. When the imago first comes out it is soft and flabby, and the wings are soft bags. They are rapidly distended. Fig. 82.—Army-worm moth (Leucania unipuncta). From Riley. by blood pumped into them, and, held expanded, are rapidly dried by the air into efficient organs of flight. The wings are covered with scales, and to these the color- pa
. Elements of comparative zoology. Zoology. INSECTS. 263 cies which have a cocoon the silken threads are softened by fluids secreted by the imago, and in some there are hooks at the bases of the wings which aid in tearing an opening for the escape of the moth. When the imago first comes out it is soft and flabby, and the wings are soft bags. They are rapidly distended. Fig. 82.—Army-worm moth (Leucania unipuncta). From Riley. by blood pumped into them, and, held expanded, are rapidly dried by the air into efficient organs of flight. The wings are covered with scales, and to these the color- pattern is due. These scales are merely modified hairs like those which cover the whole body. When removed the wing is seen to have a framework of supporting nervures or 'veins' which are really not veins at all. These veins vary greatly in their arrangement in different moths and butterflies, and are used as a basis of classification. While the larvae are biting insects, the adult is adapted for taking liquid nourishment by means of a so-called 1 tongue' which when not in use is coiled beneath the head like a watch-spring. This tubular structure, which, in function, is so like the beak of the bugs, is much different in structure, as it is formed by the union of the two max- illa, while the other parts—labrum, mandibles, maxillary. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
Size: 2023px × 1235px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
