THE CANADIAN ENTOMOLOGIST. 341 



of its strongly-chitinized head against the tin. The sound invariably 

 ceased when the box was touched, or even when one walked near it. 

 Probably this species has the habit observed in the case of Hepialns 

 sequoiohis (Williams, 1905, Ent. News, 16: 284). 



The larvae were not noticed to mutilate each other when kept together, 

 as those of H. sequoiolus are known to do (Williams, 1905, Ent. News, 

 16 : 20). 



The larvae and pupae are to be found chiefly in the bases of healthy 

 and dying stems, although the main mass of the stem will usually be found 

 pierced by numbers of old tunnels. The larvae apparently worked mainly 

 in the younger tissue near the surface of the ground. 



Several parasitized pupae were obtained, but the ichneumons con- 

 tained therein died in the pupal stage. No other parasites were found. 



Description of the pupa : The length varies from 3 to 4 cm., the 

 width from 7 to 8 mm.; colour dark reddish-brown, with head and dorsum 

 of pro- and mesothorax black. The shape is cylindrical ; the wings, legs 

 and antennae adhere closely, the thorax and abdomen are equal in width, 

 and the sides are almost exactly parallel. The head tapers to a rounded 

 point ventrally ; the abdomen is broadly rounded behind. A very few 

 inconspicuous yellow hairs are scattered over the surface. The head is 

 very strongly chitinized, black, with flexuous corrugations, and with four 

 irregular prominences and a median sulcus dorsally. This sulcus gives 

 off a branch on each side which runs cephalo-ventrad behind each anterior 

 prominence. Along these lateral sulci the cuticle splits upon transforma- 

 tion. 



The prothorax is very strongly chitinized, black, and strongly, longi- 

 tudinally corrugated dorsally, with a distinct median carina, more strongly 

 marked cephalad. This carina is a continuation of the line of the dorsal 

 sulcus of the head, and is continued as a narrow smooth line across the 

 meso- and metathorax. The cuticle splits along this line at transforma- 

 tion. The mesothorax and metathorax are also strongly chitinized and 

 corrugated dorsally, more strongly on the sides of the disc. The corruga- 

 tions are transverse on the middle of the disc and irregular on the sides. 

 The colour becomes lighter behind. The wings extend less than one-half 

 ( T 7/39) ^e length of the pupa. The tips of the third pair of legs project 

 caudad between the tips of the wings. The first six abdominal segments 

 are transversely and finely corrugated, more strongly cephalad. The 



