80 PROCEEDINGS OF THE AMERICAN ACADEMY 



ments is a long curled tubercle similar to those in front, but only a 

 little more than one half as long ; those on the 3d segment are 

 shorter and thicker at the end, and a little more than one half as long 

 as those on the segment in front. On each of abdominal segments 

 1 to 9 is a pair of similar tubercles or processes which increase in size 

 and length from segments 4 to 9, those on 7 to 9 being of nearly the 

 same size. On the side of each of abdominal segments 2 to 8, situated 

 far below the spiracles and just above the legs where present, are 

 similar horn-like processes, but which are longer than the dorsal ones 

 on the 2d abdominal segment, whereas on segments 3 to 8 they are 

 about the same size and length. All these processes are provided 

 with short hairs. It is probable that some or all of them are more 

 or less erectile. 



This species is allied to the larva of Attacus atlas Linn., as figured 

 by Horsfield and Moore in their Catalogue of Lepidopterous Insects, 

 II., PL XX. Fig. 2. It differs, however, from the full-grown larva 

 of that Asiatic species in the dorsal abdominal processes being shorter, 

 and the lateral abdominal ones being much longer, especially on seg- 

 ments 4 to 9, while the thoracic ones are longer, especially the first pair 

 next to the head. But the larva is of the same general shape, and 

 undoubtedly is a true Attacus. 



Attacus appears to be the only genus possessing these remarkably 

 soft, long fleshy processes, which remind us of those of the Cochliopod 

 Phobetron. 



The Life History of Telea polyphemus (Cramer). 



The larvse, usually feeding on the oak, have been found on the 

 chestnut, and in Maine on the beech. Although so often raised, a full 

 life history of this fine insect has not yet been published. 



Egg. — Regularly oval-cylindrical, each end alike ; flattened at 

 each pole ; surface chalky white, with a very broad, conspicuous dark 

 brown band. Under a lens, the surface of the shell is seen to be 

 finely pitted or granulated ; under a half-inch objective, the surface is 

 seen to be covered with round shallow depressions bordered with a 

 well marked rim ; these orbicular areas do not touch each other, there 

 being quite wide spaces between them ; they are arranged obliquely. 

 Length of egg 2.6 mm., breadth 2.2 mm. 



Larva, Stage I. — Hatched June 12. (Described when 20-24 hours 

 old.) 



The brood hatches all at once, or nearly so. Length 5 to 6 mm. 



