. The butterfly book; a popular guide to a knowledge of the butterflies of North America. Butterflies. Fig. 16.—Caterpillar of /inosia plexipptis, milkweed butterfly (Riley). to the thorax of the perfect insect and the last nine to the abdomen of the butterfly. On each ring, with the exception of the second, the third, and the last, there is found on either side a small oval opening known as a spiracle, through which the creature breathes. As a rule, the spiracles of the first and eleventh rings are larger in size than the others. Every caterpillar has on each of the first three segments a pai
. The butterfly book; a popular guide to a knowledge of the butterflies of North America. Butterflies. Fig. 16.—Caterpillar of /inosia plexipptis, milkweed butterfly (Riley). to the thorax of the perfect insect and the last nine to the abdomen of the butterfly. On each ring, with the exception of the second, the third, and the last, there is found on either side a small oval opening known as a spiracle, through which the creature breathes. As a rule, the spiracles of the first and eleventh rings are larger in size than the others. Every caterpillar has on each of the first three segments a pair of legs, which are organs composed of three somewhat horny parts covered and bound together with skin, and armed at their extremities by a sharp claw (Fig. 17). These three pairs of feet in the caterpillar are always known as the fore legs, and corre- FiG. 17. — Fore leg of caterpil- lar of Vanes- sa antiop a,tn- larged. Fig. 18.—Ante- rior segments of cat- erpillar of milkweed butterfly, showing thoracic or true legs (Riley).. Fig. 19. —Proleg of caterpillar of Vanessa antiopa, enlarged. spond to the six which are found in the butterfly or the moth. In addition, in most cases, we find four pairs of prolegs on the under side of the segments from the sixth to the ninth, and another pair on the last segment, which latter pair are. 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 Holland, W. J. (William Jacob), 1848-1932. New York, Doubleday, Page & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbutterf, bookyear1904
