

Image 63 of Annual report. 1908

Part of Kentucky Agricultural Experiment Station

item | thumbnails | details | text | pdf
Download this image
V 42 Bulletin No. 133. . The pupa is generally placed everywhere about the trees, a leaf ? or two being drawn together and the hairs from the body, together with a little silk spun from the mouth, being employed in the-walls Q i of the rather thin cocoon. The larvae attack besides apple and plum, soft maple, willow, Q rose, elm, pear, black walnut, and some of the evergreens. {About V cities during the past summer, the egg—masses were very common e¥· objects attached to the trunks of trees along streets. They were observed not only in Kentucky but in several other States of the Mississippi Valley. V . Description. ' ; Egg.—4Spheric·al, smooth, white, 0.034 inch (0.85 mm.) in di- ‘ ameter. Q Larva.-— Cylindrical, moderately stout; head relatively large. Body marked with longitudinal stripes of black and white. Head 2 bright red, apparently naked, but under a magnifier seen] to bear some very small soft hairs. From the first body division (prothorax) arise two tufts or pencils of long black hairs, each with a little ‘ feather (plumose) at its tip. These tufts are nearly half the length of the body, and are composed of hairs of various lengths. ' - On each of the fourth to the seventh body divisions, inclusive, is . a single median dorsal bunch of short cream-colored hairs. Soft hairs, mostly whitish, with scattered longer black ones, arise all along the sides, and on the eleventh (Sth abdominal) somitearises .:_ i a single l—ong tuft of brown and black hairs intermingled, the latter with small feathery tips like those of the anterior tufts; On the Y twelfth body division is a sort of fringe of brown and black hairs, T w*hic*h are plumose from base to tip. The ninth and tenth body ‘ ' divisions each bears on its dorsal side a small bright red, truncate, ··, turret—sh¤aped structure. The noticeable markings are a black stripe along the middle of the hack, a narrower yellorw stripe on each ,.' side of it, abroad brown stripe including the spiracles at its ventral i margin, and a yellow stripe outside the latter. L The ventral side is uniformly pale, including both jointed and . fleshy legs; the latter have noticeiably expanded tips. Length when grown, about one inch. l Pupa.— Stout, especially the female, which is more than twice Y as large as the male pupa. Thorax and abdomen clothed with pubes- cence. Antennal cases of male, wide and convex, curving inward and almost meeting over the leg-cases at about half the distance ` from front of head to tips of wing-cases. The antennal cases of the female are narrow and shorter, terminating outside the leg- I I L r