218 Forty-first Report on the State Museu3i. 



Larva and Pupa Described. 



Larva. — Tlie body is somewhat flattened; bead scarcely two-thirds 

 as wide as the body in the middle, black, becoming broAvn in 

 front near the jaws. Body livid-brown above: the tubercles black; 

 paler beneath, with three pairs of black jointed thoracic legs; no 

 abdominal legs, but an anal -pro-^-leg. The abdominal segments each 

 with a transverse, oval-rounded, ventral, rough space forming a series 

 of creeping tubercles; and in front of each segment is a transverse, 

 oval, crescentic, chitinous area bearing two joihferous tubercles; the 

 back of each segment divided into two ridges, each bearing a row of 

 six sharp tubercles, bearing short hairs; a single ventral row on 'each 

 side of the ventral plate. Length, 7-10'^"^- [0.28 to 0.4 inch]. 



Pupa. — Body rather thick, white. Antennae passing around the 

 bent knees (femero-tibial joints) of the first and second pairs of legs, 

 the end scarcely going beyond the middle of the body. Elytra with 

 five or six rather deep, longitudinal creases. The salient points of the 

 body armed with piliferous warts. Abdominal tip square at the end, 

 with a stout, black spine projecting from each side. Length, 6™™' 

 [0.24 inch]. 



The following descriptive notes were made by me of living examples 

 of the larvse, on July 25, when nearly grown : 



Black, fuscous in the incisures, and beneath. Head small, shining, 

 about one-half as broad as the adjoining segment, with some 

 brown hairs. First segment with a glossy black plate (collar) and 

 bordered anteriorly with a few short hairs ; abdominal segments, as 

 seen from above, showing two transverse rows divided by a deep con- 

 striction, of six setiferous tubercles — two small ones on each side, the 

 two mesial ones on the front of the segment contiguous or subconnected, 

 forming an elongated spot, and the two posterior ones connected in 

 a shorter spot ; in addition to these is a broad stigmatal tubercle 

 which projects so as to give an angulated form to the segment at this 

 point. Beneath, on each abdominal segment anteriorly, is a rough- 

 ened ellipsoidal mesial spot, and two smaller ones behind (the creep- 

 ing tubercles of the Packard description), distant from one another 

 about the length of the front spot, each with two short whitish setse. 

 Legs long, shining black ; a single terminal proleg. The abdomen 

 tapers uniformly at each extremity. 



The excrementa are scrap-like or thread-like, instead of rounded as 

 in many Coleoj)tera. 



Length of larvse nearly one-half of an inch. 



Its Recent Occurrence at Lake Pleasant, N. Y. 

 When at Lake Pleasant, in Hamilton county, N. Y., almost as soon 

 as my interest in insects became known, it was asked if I had noticed a 

 strange attack on the alders, which had never been observed before, 



