Studies on Life-history of Bomhycive Moths. 76 



and smaller, varying in size ; the longest ones are three times as 

 long as the shorter ones ; the lateral warts still bear but two hairs. 

 There is a subdorsal row of reddish-brown irregular spots, and 

 another similar row on the sides low down. The thoracic and 

 abdominal legs are blackish. 



It molted July 10th to 12th; the duration of the stage being 

 about 10 days; and was described after molting on the 12th of 

 July. 



Stage III. — Length 15 mm., finally becoming 20 mm. The head 

 is small, black ; the body thick, tapering at each end. All the 

 tubercles are black, with black and white hairs of unequal length, 

 the longest equalling the diameter of the body. A broad, some- 

 what broken white, conspicuous dorsal line finally becoming yellow. 

 An interrupted yellowit^h broad baud on the side, bounded above 

 and below by a whitish-yellowish line somewhat wavy, and intei*- 

 rupted by the yellow patch on each segment forming the broken 

 band; the tubercles being situated in the yellow patches, one in 

 each ; they are black at each end of the body, but yellowish or 

 nearly so in the middle segments. All the legs are blackish. 



Molted July 20th to 25th; the length of this stage being about 

 10 days. 



Stage IV. — Length 35 mm. Much as before, but much larger, 

 the pale yellowish dorsal line is now wanting and the entire dorsal 

 region has become dark leaden-gray, with short spreading verticil- 

 late hairs on the two middle rows of tubercles, the subdorsal ones 

 giving out longer unequal hairs, which are more or less leaden- 

 gray. There are now two parallel lateral rows of small bright 

 yellow spots; between each set of spots are two light reddish- 

 brown tubercles which give oif gray hairs, mixed with whitish 

 ones. The hairs cover the body more densely than before ; and 

 the head is black and the body beneath deep leaden-gray. All the 

 feet, both thoracic and abdominal, are black. The spiracles are 

 whitish on a blackish field. The head with the clypeus above and 

 the antennae are yellowish, but the yellow spot on the clypeus is 

 smaller bv one-half than in stage III. 



It molted again July 30th to 31st, hence the length of stage IV 

 was about 10 days. 



Stage V and last. — Length 35 to 40 mm. A great change takes 

 place at this molt. Now the hairs are long and slender, fine and 

 soft, and most of them as long as the body is thick, with a few at 



