Studies on Life-history of Bombycint! Moths. 47 



feeding on the haw. They did not molt or grow, and undoubtedly 

 the species hibernates in this stage. 



Stage II a?' III. — Length 6 mm.; of the tail 2 mm. The head 

 is as wide as the body in the middle, the skin rough and warty; 

 the vertex ending in two high conical tuberculated protuberances 

 which rise high above the lev§J of the prothoracic segment. The 

 head is smoother in front than on the sides, being freer from the 

 tubercles ; it is of the same color as the body, but the two pro- 

 tuberances on the vertex are paler than below, corresponding to the 

 lighter more ashen hue of the upper side of the body. The 1st 

 thoracic segment with the front edge considerably raised and thick- 

 ened, bearing two sharply conical warted tubercles about one-half 

 as large as the two on the head and situated directly behind them. 

 The 1st is not quite so wide as the 2d thoracic segment, but it is 

 slightly wider than the abdominal segments, which are all of the 

 same width as far as and including the 6th, when the body gradu- 

 ally tapers to the tail, or tail-like suranal plate which forms a long 

 cylindrical appendage gradually tapering to the rather obtuse end ; 

 it is tuberculated like the rest of the body, and a little darker in 

 some specimens; it is as long as abdominal segments 3 to 6 taken 

 together. The skin of the body is coarsely tuberculated, form- 

 ing whitish close-set granulations; the segments are transversely 

 wrinkled, four wrinkles to a segment, in the middle of the body. 

 On top of the 3d thoracic segment is an irregular rounded knob or 

 tubercle, the surface of which is granulated, but not differing in 

 color unless a shade darker. At the base of both the thoracic and 

 abdominal legs are short stiff depressed hairs. The color of the 

 entire body, including the legs, is of a uniform dark walnut-brown. 



Family PSYCHID.E. 

 The larva of Lacosoma chiridota Grote. 



T am indel)ted to Mr. James Angus, of West Farms, New York, 

 and to Miss Caroline G. Soule, of Brookline, for the material (sent 

 in September) from which the following description has been drawn 

 up. See also Dr. Riley's notes on this caterpillar.' Mr. Angus 



^ Fifth Report U. S. Entomological Commission, on Insects Injurious to 

 Forest and Shade Trees, by A. S. Packard. See (p. 141) Riley's notes on its 

 habits, and his description with my description of his alcoholic specimen. 



