9 



Insects. 



8095 



both extremities ; the incisions between the segments are well marked, the segments 

 Being distinctly divided ; on each segment are six warts, neither of them conspicuous, 

 but each emitting a thin fascicle of short radiating bristles, among which are inter- 

 spersed a few longer silky hairs : every part of the dorsal surface, the warts alone 

 excepted, is covered with minute papillifonn black dots. Head black, shining: 2nd 

 segment dingy yellow in front, black and rather shining on the disk, purplish flesh- 

 coloured beneath ; median line of the back dingy white, narrowly bordered with very 

 dark reddish purple ; exterior to these narrow borders is a broad dingy yellow stripe 

 on each side, swelling on each segment into a rounded lobe ; the sinuous exterior mar- 

 gin of the yellow stripes is bordered with black, which is gradually shaded off into 

 reddish purple in the spiracular region ; belly and claspers dingy flesh-colour : legs 

 black. The larva? were full-fed early in May, and spun a thin white silken cocoon 

 among the leaves of the food-plant, in which they turned to pupae. Pupa brown, 

 smooth, obese, the anterior extremity acute, the posterior remarkably obtuse: the dor- 

 sal surface incised at the segments as in the larva, and the posterior margin of each 

 projecting over the anterior margin of the next ; the wing-cases ample and clearly 

 defined ; the leg-cases extending to the extremity of the abdomen ; the colour brown, 

 with longitudinal series of darker dots, those in the middle approximate, the others 

 more distant. The imago appeared at the end of May and beginning of June, six- 

 teen days elapsing between the first and last. — Edward Newman. 



Description of the Larva of Orgyiu ceenosa. — The females, which are very sluggish, 

 lay their eggs on the stems or blades of Cladium Mariscus or Arundo Phragmites, in 

 a single row, sometimes more than twenty together : they hatch in aboui fourteen 

 days, and the young larva hybernates when very small ; no date can be given with 

 any precision, since the egg, newly. hatched larva, full-grown larva, pupa and imago 

 have often been found on the same day during the summer. The full-grown larva 

 rests in a nearly straight position. on the stems or leaves of its food-plant: head prone, 

 quite as wide as the body and hairy, the baits directed forwards: body of nearly uni- 

 form substance throughout; 2nd segment emitting two long slender fascicles of hair, 

 directed forwards and projecting over the head, and slightly divaricating ; the 5th, 

 6th, 7th and 8th segments have severally a dense median dorsal brush of stiff erect 

 hairs ; the 10th and 1 1th segments have each a median ovate dorsal valvular opening; 

 the 12th segment emits a single fascicle of long hair which is directed backwards, and 

 the 13th segment has a great number of long hairs directed backwards ; the 3rd, 4th, 

 9lh, 10th, 1 1 ill and 12th segments have each eight wart-like protuberances, each of 

 which emits a fascicle of radiating hairs; the 5th, 6th, 7th and 8th segments have 

 each three such wart-like protuberances and fascicles on each side. Head pale red- 

 dish brown, with while labium, and a black blotch on each side of it, bordering the 

 mouth : the long fascicles on the 2nd and 12th segments are black ; those composing 

 the dorsal brushes, as well as those on the sides, golden yellow ; hairs on the head 

 black ; those on the 13th segment are for the most part black, some few being yellow; 

 ground colour of a median dorsal stripe intense velvety black; sides paler, somewhat 

 smoke-coloured : a pale yellow stripe, interrupted at each wart of the third lateral 

 series, on the 6th, 7th, 8th, 9th, 10th, 11th and 12th segments; all the warts, as well 

 as the legs and claspers, are pale obscure wainscot-brown. Arrived at maturity the 

 larva spins a long, yellow and rather shuttle-shaped cocoon, in which are interspersed 

 a great number of its hairs ; this cocoon is slightly open at the upper end, and is also 

 fastened longitudinally on the stem or leaf of its food-plant. The imago emerges 



