DEBIS I. 



which comes a long, tapering hair; a few hairs over the front. (Figs, b to ¥.) 

 Duration of this .stage, six to eight days. 



After first moult : length .26 inch ; the dorsum arched, on 3 and 4 depressed ; 

 13 ending in two long, tapering tails ; color bright green ; densely covered with 

 low, sharp, whitish tubercles, which are dispo.sed in longitudinal rows, one of 

 which edges either side the dark green mid-dorsal stripe, and another lies be- 

 tween this and the sub-dorsal narrow yellowish stripe, which itself is crowded 

 with tubercles ; below this stripe there are four somewhat irregular rows, and 

 then the yellowLsh basal stripe ; each tubercle gives a very short white hair ; 

 under side, feet, and pro-legs paler green, head higher than before, the sides less 

 curved, depressed somewhat more ; on each vertex a high, conical process, Avhich, 

 as well as the whole face and back, is thickly covered with whitish sub-conical 

 tubercles, each with its short white hair ; color green, the ends of the processes 

 red. (Figs, c to c^.) Duration of this stage, seven to eight days. 



After second moult : length .44 inch ; .shape as at second stage ; tubercu- 

 lated in same way ; the sub-dorsal and basal stripes as before ; head same, the 

 processes more red. (Fig. d.) To next moult about nine days, but, like all 

 stages, the duration depends on the weather. 



After third moult : length .52 inch, scarcely different. (Fig. e.) To next 

 moult, in a single instance, si.x days ; all other larvae hibernated at this stage. 



After fourth moult, in spring : length .G inch ; shape nearly as before, the 

 abdominal segments arched, the others level ; tails long ; color yellow-green ; a 

 darker mid-dorsal band, a green line next above the yellow sub-dorsal stripe, and 

 another on mid-side ; the basal stripe yellow ; head narrower at top, the bases of 

 the processes meeting at the suture ; color green, the ends red. (Figs./ to/''.) 

 To last moult eleven days ; in one instance sixteen, in another twenty days, 

 owing to cold weather. 



After fifth moult : length 1 inch ; in about ten days the larva was full-grown. 



Mature Larva. — Length, <? , 1.2 inch, greatest breadth, on middle segments, 

 .16 inch ; 9 , 1.4 inch, breadth .17 inch ; cylindrical, .slender, the dorsum arched, 

 and sloping about equally either way from the middle ; 13 ending in two long, 

 slender, tapering tails ; color yellow-green ; on mid-dorsum a dark green band, 

 on the edge of dorsal area a narrow j^ellow stripe to the tail, and on upper .side 

 of it a dark green line, another such line on mid-side, and a yellow stripe along 



