70 Studies on Life-history of Bombycine Moths. 



body is in general black, honey-yellow on the sides, including the 

 abdominal legs. The dorsal warts emit short radiating even white 

 hairs ; those low down on the sides spreading and much longer and 

 more uneven. From the second thoracic segment long white hairs 

 project over the head, with several black ones on each side. From 

 the third thoracic segment arise two subdorsal oblique distinct black 

 fufts. On abdominal segments t and 8 is a short conical double 

 black dorsal tuft, that on the 8th segment twice as large as the one 

 on the 7th segment, and from each side of the same segment pro- 

 jects a black pencil ; among the black hairs composing the pencil is 

 a white hair longer than any of the others. The base of the tuber- 

 cle, from which the pencil arises, is whitish, and in part deep flesh- 

 colored, and the spiracles of the ninth pair are white and conspicuous. 



The end of stage III just before moulting. — (Described Septem- 

 ber 18th.) Length 14-20 mm. Head as before, black with the front 

 part of theclypeus, the labial lobes and the basal joint of the antennae 

 white. The body is not entirely livid, blackish, there being a broad 

 pale whitish band along the sides of the body between the white 

 spiracles and the base of the legs. Along the back the median 

 dorsal tufts on abdominal segments 1-6 of the two last stages are 

 still wanting, so that the blackish body shows through the hairs. On 

 the 7th abdominal segment is a median dorsal black double wedge- 

 shaped tuft, and on segment 8th there are two double wedge-shaped 

 black tufts, a little longer than in front, and composed of black hairs 

 arising from the four dorsal tubercles of this segment; the outer of 

 these warts have, arising from the side, the short radiating whitish 

 hairs, the pencil of black hairs arising from the inner side, so that 

 from one and the same tubercle originate short radiating whitish 

 hairs, and also long black hairs. From the largest lateral tubercle 

 on the same segment besides about sixteen whitish radiating hairs 

 of unequal size and length, arises a pencil consisting of nine long 

 black hairs. This pencil in the present stage is smaller and shorter 

 than in the last stage, and easily overlooked. The anterior black 

 pencils also arise from warts which also send off" the short radiating 

 hairs. The four anterior black pencils are also smaller and slighter, 

 composed of a less number of hairs than in the last stage. 



In this stage, also, in larva? 20 mm. in length, the three thoracic 

 segments are whitish behind on the back, and dusky in front. 



Stage 1 V. — Length 24-25 mm. (De.scribed September 18th.) The 

 head as before. The radiating hairs are now whitish-yellow to pale 



