—95— 



measure from i (tf) to i£ (9) inch. Head shining, dark brown, rather 

 hairy, mouth-parts lighter. Ground color dark slate, almost black, 

 velvety ; stigmatal region light yellowish-gray, almost the color of vestiture; 

 this color spreads in fine lines across segment-joints ; stigmata whitish, 

 ventral area almost black; legs whitish, rather hairy. The hair of the 

 larva is mouse-gray, feathered and soft. On 2nd and 3rd, but far more 

 so on 4th, 5th, 6th and 7th segments, the dorsal protuberances are ridge- 

 like, enlarged but low, and the hair-tufts arising from these large bases 

 cover the dorsal region of the resting insect entirely ; when moving, only 

 the joints are visible. Supra-stigmatal warts on first segment without the 

 feathery hair, the small warts bearing some plain, spreading hairs, on all 

 other segments these warts are ornamented besides with bushy rounded 

 tufts of feathery hair. Infra-stigmatal protuberance with longer, bushy, 

 fringe-like, spreading tufts ; pedal line of warts similarly provided. The 

 slender black brushes on 1st segments, which project from the centre of 

 infra-stigmatal tufts are of about ^ the length of larva and composed of 

 differently feathered hair ; corresponding to these are a few single black 

 hairs on anal segment. The black, dense tuft on dorsal warts on 4th 

 segment slightly overreaching the surrounding hair ; dorsal tufts on 5th, 

 6th and 7th segments mixed with dark hair. On 1 ith segment the rounded 

 black tuft arising from the two warts is still higher. The vestiture on 9th 

 and 10th segments is more scant and the larva-skin always visible. The 

 amber-colored, cylindrical excrescences between the dorsal warts on these 

 segments are scarcely ^ the length of the adjoining hair. The larva, when 

 resting, bends the head down, and as the vestiture on the next segments 

 is richest and longest, the insect gets an almost hunched appearance. 



The larvae commenced to form their cocoons September 26th, about 

 two-thirds went into the pupa state by Sept. 30th ; all the rest but one or 

 two had spun by Oct. 5th. They mostly spin at night; having covered 

 the resting place first with a fine web, they form a very fine net-work, into 

 which they twist all their own hair. The cocoon is thin, easily torn, and 

 of an almost regular, oval shape. The empty larva-skin, stripped of all 

 its hair often adheres like a tail to the cocoon, which by the peculiarity of 

 the hair of which it is formed and a few spun threads, is securely fastened 

 to sheltered places on stones or wood. The pupa itself is about |- (<^) 

 to 1 inch (9 ) long, rather stout, ending in a spine with which it is fastened 

 to the cocoon. The color is light yellow-brown, wing-cases and stigmata 

 dark brown ; thoracic region, the segment joints and cremaster are brown. 

 All the warts, even the pedal line, seem to be retained on the abdominal 

 segments as minutely granulated patches, covered with short hair. The 

 six dorsal warts on 5th, 6th and 7th segments are represented by six ro- 

 sette-shaped, lichen-like formations of yellowish-gray color, the two warts 



