148 THE CANADIAN ENTOMOLOGIST. 



Stage III. — Length 5.5 mm. Head 0.7 mm. wide, blackish. Tlie, 

 two iarvte in this Stage do not show any dift'erence from Stage II. The 

 general colour is the same, as is also the pale blue dorsal stripe, and the 

 yellowish colour of the skin between tubercles ii. and iii., iii. and iv., iv. 

 and V. and v. and vi., shading to greenish subventrally. Tubercles black 

 and shiny; bristles as before, the black ones mostly from i., ii. and iii., 

 and the silvery or slightly rusty bristles from iv. and lower tubercles. 

 Thoracic feet blackish, shiny; prolegs, upper portion blackish, lower 

 portion pale. 



Stage IV. — Length 9.5 mm. Head 0.9 ram. wide, black with 

 exception of a pale brownish space on cheek above ocelli. The general 

 appearance of the larvse in this Stage is darker than in Stage III. The 

 skin of dorsum is mostly blackish, and shades to blackish-gray subven- 

 trally. The dorsal stripe is conspicuous, and now almost a cream colour. 

 The yellowish blotches along the sides are still present and the series 

 between ii. and iii. appears almost as a lateral stripe. I'he tubercles and 

 bristles are as in last Stage. Spiracles small, black, close in front of the 

 lower edge of tubercle iv. Thoracic feet black ; prolegs, upper half 

 blackish, lower half paler. 



Stage V. — Length 12.5 mm. Head 1.2 mm. wide, black, shiny. 

 Body in general appearance blackish. Skin on dorsum grayish, mottled 

 and blotched with velvety black. Skin on sides yellowish-gray and also 

 blotched with black, but not so heavily marked as on dorsum. Venter 

 much paler than dorsum. Dorsal stripe conspicuous, yellowish, creamy at 

 intersegmental folds. Tubercles black, shiny. Between tubercles ii. and 

 iii. is a distinct lateral band of pale yellow. The whole of tubercle ii. on 

 the inside is margined with pale yellow. The skin between iii. and iv. 

 and iv. and v. is also rather intensely yellow. Spiracles black close in 

 front of iv. Each tubercle has a bunch of barbed bristles, those from i., 

 ii. and iii. being black, while those from iv. and lower tubercles are 

 mostly ])ale rusty. The dorsal tubercles on segments 12 and 13 bear a 

 few very long slender bristles, which are pale grayish at tips. Thoracic 

 feet shiny, black. 



Stage VI. — Length 14 mm. Head 1.6 mm. wide, subquadrate, 

 slightly bilobed, black, excepting just above ocelli, where there is a pale 

 brownish patch with dark moltlings ; hairs on face black, of varying 

 lengths ; mouth-parts reddish. Body black, shading to grayish-black 

 ventrally. Under a lens, the skin is grayish mottled with velvety black, 



