120 THE CANADIAN ENTOMOLOGIST. 



Stage II — Length just after moulting, 5 mm. General colour dark 

 grayish, turning paler towards end of stage. Head 0.5 mm. wide, black, 

 slightly depressed at vertex. Thoracic shield dark brown. A series of 

 conspicuous reddish blotches now occur on the dorsum, in a line with 

 tubercle i, and also others of the same colour below the lateral tubercles, 

 those near tubercle ii, however, being more intense in colour, almost a 

 blood-red. Tubercles black, shiny, each bearing a bunch of spreading 

 bristles of varying lengths, those from tubercles below the spiracles being 

 pale, almost golden, while those from the dorsal and upper lateral tubercles 

 are black. Spiracles black. Prolegs pale, thoracic feet darkened. 



A few larvse moulted the second time on June 11, others on 12th 

 and 13th. 



Stage HI. — Length at first, 8 mm. Head 0.9 mm. wide, black, 

 shining. Body darker than in Stage H, caused by the reddish blotches 

 on skin being now of a dull purplish colour, the whole skin being more 

 heavily streaked and blotched than before. Under a lens the greenish 

 ground colour of the skin shows up against the dull purple in the centre 

 of the dorsum as a stripe. The bristles from the tubercles below spiracles 

 are of a pale rusty tinge. Otherwise the larvae are the same as in last stage. 



Larvae moulted for the third time on June 16, 17 and 18. 



Stage IV. — Head 1.2 mm. wide, black, shiny, as in previous stages. 

 The larvse now differ in the blotches on the skin being darker, some 

 specimens having a pale dorsal stripe, and the bristles from all the 

 tubercles being of a pale rusty colour. Length at end of stage, when at 

 rest, 15 mm. 



Larvae moulted again on June 21, 22 and 23. 



Stage V. — Length just after moulting and at rest, 15 mm. Head 2.0 

 to 2.2 mm. wide, rounded, somewhat quadrate, depressed at vertex ; black, 

 shiny, brownish patch on cheek above ocelli. The skin is of a uniform 

 dull purplish colour, paler around the tubercles, which are dull blackish. 

 Tubercles, with exception of ventral series, large ; i slightly smaller than 

 ii and iii. Bristles from tubercles stout, conspicuously barbed, of a dull 

 rusty or mouse-colour, those below the spiracles being brighter. The pale 

 dorsal stripe present in some specimens in Stage IV is only visible now 

 just after moulting. Spiracles cream-coloured, ringed with black. 

 Thoracic feet black, shining ; prolegs, upper half concolorous with venter, 

 lower half pale. 



