. Agricultural zoology. Zoology. INSECTS. 139 margin of the hind wing. The female possesses, in addition, two round black patches on the middle of each fore wing. Under side of the fore wings milky white, yellow at the tip, blackish at the root; under side of the hind wings yellow, with black dots. Caterpillar (Fig. 95): As much as 1^ inch long; greenish, or sulphur yellow, with black dots. Head and dorsal side of last segment of the body grey with black spots. Young specimens are of a very bright green with black wartlets closely crowded together. From the pupse which have lived through the w
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. Agricultural zoology. Zoology. INSECTS. 139 margin of the hind wing. The female possesses, in addition, two round black patches on the middle of each fore wing. Under side of the fore wings milky white, yellow at the tip, blackish at the root; under side of the hind wings yellow, with black dots. Caterpillar (Fig. 95): As much as 1^ inch long; greenish, or sulphur yellow, with black dots. Head and dorsal side of last segment of the body grey with black spots. Young specimens are of a very bright green with black wartlets closely crowded together. From the pupse which have lived through the winter butterflies emerge in May, and lay their golden yellow eggs in small heaps on the under sides of the. Fig. 96.—The Cabbage White (Pleris irassica) female laying her eggs; caterpillar, and pupa. leaves of rape, mustard, and cress, also on charlock and such-like cruciferous weeds. The caterpillars of this first generation are hatched in fourteen days, and rarely do any harm, since they only appear in small numbers. They develop rapidly, and during the last days of June become pupse on the branches and leaves of the plants they live on; the butterflies appear in July. Owing to their rapid development the caterpillars and pupse of this first generation are but little exposed to the attacks of enemies. 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 work.. Bos, Jan Ritzema, 1850-1928; Ainsworth Davis, J. R. (James Richard), 1861-1934. London, Chapman & Hall, Ld.