THE CANADIAN ENTOMOLOGIST. 223 



Newly-hatched larvae white, semi-translucent. A small dark spot on 

 each side of the head. Length about three-twentieths of an inch. As 

 soon as full fed they are green and scarcely distinguishable from the 

 leaf upon which they rest. 



April 30th they had attained a length of about two-tenths of an 

 inch. 



Colour reddish gray, narrowly striped with whitish on the sides, and 

 with a rather broad, light dorsal stripe. Head pale gray. 



May 4th, after the second moult, they appeared of a dusky green 

 colour. Dorsal stripe white. Sub-dorsal and stigmatal stripes broad, dark 

 and edged with white. 



All the tubercles black, ringed with white at the base. Eighth 

 segment with the usual dark band, but no protuberances. Head dark, 

 mouth-parts white. Black cervical and anal patches. 



At this point the larvae showed much variation in colour. 



One form was sooty or rusty black, darkest on sides ; another was 

 pale, whitish, without black cervical or anal patch, and transverse band of 

 eighth segment but faintly dark. 



At the succeeding moult this variation was still more pronounced, but 

 in the majority of specimens the colour was black, with a broad yellowish 

 dorsal stripe broken by the velvety black band of eighth segment. Sub- 

 dorsal stripes outlined with white. Face and feet black. Sides black 

 except on anterior upper part of eighth segment, where appeared a large 

 oval yellow or red patch contrasting strongly with the body colour. 

 Usually there was also a yellow patch or line across the dorsal portion of 

 segment four. 



The eighth segment had a rather high transverse ridge, and on the 

 anal segments the dorsal tubercles were long and black. 



Length at this stage three-fourths of an inch. A few whitish filaments 

 appeared along the sides, only four or five at most to any one segment. 



As the variations in colour are numerous, while the form does not 

 materially change, a description of the mature larva will suffice and avoid 

 repetition. 



May 1 2th, length one and three-fourths inches. Form slim and rather 

 long for the size. Not greatly fusiform. 



Head black behind, dusky in front, with a very small light spot near 

 top of each lobe. 



