Studies on Life-history of Bombycine Moths. 57 



with piliferous warts of the same size. Behind this segment the 

 body above is blackish, with a subdorsal line on each side, which 

 unite on the 9th segment, which is above pale ochreous. The body 

 beneath is livid. The thoracic legs are blackish, the abdominal legs 

 pale livid.- Many of the dorsal thoracic and lateral abdominal hairs 

 are pale gray. The two eversible glands are now bright coral-red, 

 as bright colored and as distinct as in the final stages. At the end 

 of this stage, just before the molt, there are visible a few feathery 

 black hairs on the inner side of the two dorsal tubercles of the 8th 

 abdominal, and in some individuals they are present on the inner 

 side of the dorsal tubercles on the 1st and 2d abdominal segments. 



Larva, stage III. — Length 10 mm. At first the larva is scarcely 

 larger than in the preceding stage just previous to molting. The 

 head is black as before. The lateral prothoracic tubercles are pale 

 Indian-red with black between them, ana give off a pencil ofptume- 

 like hairs, thickest at the end. This and the other pencils are as 

 well developed proportionally as in the full-fed larva. The top of 

 the 2d and 3d thoracic segments white and edged with ochre as 

 before. The four median dorsal tufts, one each on the four basal 

 abdominal segments, are now well developed, the two in front being 

 dark smokL,-brown, the two behind snow-white, the 4th one being 

 somewhat smaller than those in front. The 5th segment is white 

 above, ochreous on the side, as in stage II. The Sth segment bears 

 a thick long tuft of black feathery hairs, as well developed in pro- 

 portion as in the adult. The row of largest lateral tubercles is now 

 conspicuous, the warts being bright flesh-colored instead of black, 

 as before. The hairs, especially along the sides of the body, are 

 denser, more numerous, than before. 



Note. — Two days later, in a few, the two anterior dorsal median 

 abdominal tufts have faded almost white, while the two posterior 

 are straw-yellow. In most, however, the two anterior tufts remain 

 black, the two posterior ones having changed to straw yellow. 

 Length of stage about 5 days. 



Stage IV. — Molted May 31st, some as late as June 1st. Length 

 IT mm. The chief change is that each of the four dorsal tufts has 

 now become pale buff-yellow, though immediately after molting the 

 two anterior tufts are at first dusky, gradually becoming paler. The 

 subdorsal rows of these tubercles on each side are coral-red, and the 

 upper lateral row of pHiferous warts are now bright coral-red, while 

 lower down there is a small bright yellow dot, one on each segment 

 Annals N, Y, Acad. Sci., VIII, May, 1893.— 5 



