THE CANADIAN ENTOMOLOGIST. 50 



segment longer and narrower, sparsely covered above and beneath with 

 setigerous tubercles, hind angles produced, curving outward and upward 

 in the shape of horns which are thickly bristled. Between these horns 

 the hind margin bears two smaller smoother processes which curve inward. 

 Anus with two strong distant teeth on the anterior margin. 



Spiracles in nine pairs, those of the prothorax prominent and projec- 

 ting as described above. Those of the abdomen are dorso-lateral in aspect 

 and are found in segments one to eight. In a balsam preparation the 

 spiracular peritreme appears to be continuous with the body of the dorsal 

 scute, as shown in the drawing. In specimens simply taken from alcohol 

 there is apparently a suture between. 



Legs stout, the three pairs nearly equal in length, coxcC rather prom- 

 inent, fissured or emarginate internally so as to expose a small portion 

 of the basal part of the trochanter, femur broader at tip than at base, 

 somewhat longer than the tibia, which narrows slightly towards the apex. 

 All of these last-mentioned three joints are sparsely bristly. Claw large, 

 toothed obtusely near base and bearing two bristles on the inferior surface. 



The pupa, when preserved in spirits, is yellowish white, about 

 4.75 mm. long and 2 mm. across the broadest part. The most remarkable 

 characters are to be found in the armature of the prothorax and of the 

 last abdominal segment. The front and side margins of the prothorax 

 are beset with a series, about fourteen, of long, fleshy spine-like bodies, 

 each of which bears a long seta near its tip. The disk bears six similar 

 organs, while the head is armed with a row of three on each side, and a 

 single one on the occipital region. There are also several on each 

 leg. The abdomen bears a quadruple row of long bristles, two pairs 

 to each segment, and the lateral segmental prominences are each 

 armed with a pair of setigerous processes like those of the thorax. The term- 

 inal segment of the abdomen is highly modified, the apex being squarely 

 truncate at middle, the hind angles produced into rather long pointed 

 processes with curved tips. This segment bears two long bristles at the 

 base of each of the processes, as well as a pair on each side nearer the 

 base ; the under side of this joint is more thickly spinous than the upper. 

 The figure of the pupa shows the general form and the location of the 

 larger bristles, but no attempt has been made to incorporate the small, 

 inconspicuous ones, as many would almost certainly be overlooked on the 

 whitish surface, and the drawing might thus give rise to erroneous 

 impressions. 



