. Bulletin of the Department of Agriculture. Agriculture. 6' BULLETIN 438, U. S. DEPARTMENT OF AGRICULTURE. a characteristic curled position, and when the larva is disturbed this posterior curled part is thrown up in a threatening manner. The full grown larva (fig. 1, c) measures 12 mm. ( inch) in length and mm. in width. The head is light green, dotted antero-dorsally with small brown dots. Upon closer examination these dots are seen to be divided into two or three parts which fit closely together. The eyes are black; the mouth parts dark brown, and the clypeus light brown vdi\\ a
. Bulletin of the Department of Agriculture. Agriculture. 6' BULLETIN 438, U. S. DEPARTMENT OF AGRICULTURE. a characteristic curled position, and when the larva is disturbed this posterior curled part is thrown up in a threatening manner. The full grown larva (fig. 1, c) measures 12 mm. ( inch) in length and mm. in width. The head is light green, dotted antero-dorsally with small brown dots. Upon closer examination these dots are seen to be divided into two or three parts which fit closely together. The eyes are black; the mouth parts dark brown, and the clypeus light brown vdi\\ a narrow inverted V-shaped band of green between it and the dotted area, wliich latter extends from the eyes back to the inser- tion of the head into the thorax and is divided dorso-frontally by a nar- row green line. Ordinarily the larva when full growai drops to the ground, but some have been noticed crawling about the trunks of the trees as though crawling to the soil. This is imusual, however, and probably occurs with those larvae that happen to have been feeding near the main trunk. Just before the larva is ready to drop to the groimd for "cocooning," the caudal segments turn yellowish. THE COCOON AND PUPA. The cocoon (fig, 2; PI. I, fig. 4) is cylindrical, slightly constricted at the middle, rounded at the ends and somewhat larger at one end than at the other. It is closely woveu of fine silk, smooth inside and roughened or with a pebbled appearance, due to the ad- herence of small bits of soil, outside. It is at first light greenish and if kept dry re- mains a straw color, but if moistened, as it usually is when spun in the soil, it soon "''u^.':i,lS::SZT'°- darkens, becoming a dark brown. Some larvse spin a quantity of loose, red-brown silk about the outside before spinning the light-green cocoon, especially if the cocoon happens to be spun among old leaves in the soil, and an occasional cocoon is found wliich is entirely of this red-brown color. The larv
Size: 2106px × 1187px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
