THE CANADIAN ENTOMOLOGIST. 123 



After Second Moult — Length .3 inch ; color dark (or red-brown) 

 orange, glossy ; between dorsals and first laterals a greenish-brown band, 

 not well defined — rather a discoloration, and about segment 10 fading 

 away ; the spines long, all black and shining, from black tubercles ; those 

 of dorsal rows on 3 and 4 longest, those of first laterals on 2 and 3 nearly 

 as long ; collar on 2 black ; head as at second stage, glossy black ; the 

 vertices rather high, conical ; the processes two thirds as long as the dorsal 

 spines on segment 3, irregularly tapering, slightly bent back, conical at 

 top. Duration of this stage 36 hours. 



After Third Moult — Length .8 inch ; color now dark orange, glossy; 

 a medio-dorsal stripe of olive-brown ; a broad band of same hue fills the 

 space between dorsals and first laterals from 2 to 13 ; the lower part of 

 body also olive-brown, so that the orange is restricted to the dorsal area 

 and lower part of sides ; in some examples the band is macular, orange 

 showing in it ; head as before, but the vertices higher, and the processes 

 longer and much recurved, resembling horns ; face black on front, behind 

 the head orange, but from base of each horn a black stripe passes down 

 the back of the head ; on the front are five minute orange spots, one at 

 base of each horn, and three in a cross row below. Duration of this stage 

 36 to 40 hours. 



After fourth Moult — Length .95 inch ; color red-orange, the medio- 

 dorsal stripe greenish, the lateral band pale black, and broadened, so as 

 to come to the outer sides of the tubercles of the two rows ; the base same 

 color as the band ; the orange restricted to a narrow band running with 

 the spiracles. Twenty-four hours after this moult the length was 1.2 inch, 

 and one day after this was 1.5 inch. 



Mature Larva — Length 1.5 inch, greatest breadth .24 inch; cylin- 

 drical, thickest at segments 3 to 5, tapering to 13 very gradually ; furnished 

 with six rows of long, tapering black spines, bluntly conical at top, from 

 which springs a short and fine black bristle ; a few similar bristles irregu- 

 larly placed about each spine from base to top ; two of these rows are 

 subdorsal, and on middle of either side is one, and one below spiracles ; 

 the dorsals. extend from 3 to 13, the first laterals from 2 to 12 ; the lower 

 laterals from 6 to 13 ; over the feet on each side of 2, 3, 4 is a black 

 tubercle with hairs ; the spines of dorsal rows on the anterior segments 

 are longest, measuring .16 inch ; the first laterals are quite uniformly .11 



