THE CANADIAN ENTOMOLOGIST. 105 



Dorsal, lateral and ventral region purpHsh-violet to purplish-brown ; stig- 

 niatal area white ; warts very minute, with blackish points emitting a 

 single short black hair. 



The changes the larvae gradually undergo up to their last stage are 

 rather limited ; their skin turns wrinkled by numerous transverse folds, the 

 whole stigmatal area gets greatly reduced and obscured by many irregular 

 purplish-brown length-lines. The head and first segment become adjusted 

 to nearly the same width, though they are perceptibly narrower than 

 second somite, from which the body slowly gains towards the last two 

 segments, which appear abruptly widened. 



The majority of the full-grown larvse measured 4.5 centim., width of 

 head 2.15 millim. ; they are widest at the last four somites, where they 

 measure about }^ centim., tapering gradually towards second somite. 

 The head and first segment are of almost the same v/idth, and rather 

 abruptly set off, anal legs very much developed, and provided with 

 moderately long spurs, which bear a single short bristle. 



Head nearly smooth, rounded above, flat in front, of the same light 

 brown colour as cervical shield, whose dark brown lateral bands extend 

 over the cheeks, terminating wedge-like near the white-tipped antennae. 



From second to last somite the colour of the larvae is almost 

 uniformly purplish-brown, variegated by fine, often interrupted, whitish 

 lines and irrorations, which are most prominent on posterior part 

 of somites. Fourth and fifth segments have anteriorly a black patch, 

 extending from longitudinal fold to lateral space. Ventrally the whitish 

 lines and irrorations mostly prevail, giving this area often a nearly grayish 

 appearance. 



Tubercles small, dark brown, conical, pointed, with a short single hair; 

 wart ii. more developed on 7th and 8th somite, but not exceeding in 

 height 0.5 mm. 



On second segment the prominent longitudinal fold has the tubercles 

 within its sphere enlarged and rounded, thus obtaining almost the appear- 

 ance of an excrescence. 



The slender pupae vary considerably in size and colour, measuring 

 from the slightly protruding head to cremaster from 1.5 to 2.0 centim., 

 width of 5th abdominal somite from 5.5 to 7.5 mm. They are finely but 

 very profusely, granular and wrinkled, especially the wing-covers, thorax 

 and sheaths of limbs. The strong, rugose, flat and pointed cremaster ends 

 with two slender hooks and six smaller capitate ones at the edges. 



