232 THE CANADIAN ENTOMOLOGIST. 



After 2nd Moult—Length .3 inch ; color a shade darker, the spines 

 lengthened, those on 2 measuring .05 inch, being considerably longer 

 than the rest, directed a little forward and somewhat recurved ; the white 

 rows more distinct and more complete, and stand on narrow pale brown 

 bands ; head as before. To next moult 2 to 6 days. 



After 3rd Moult — Length .55 inch ; much as at last preceding stage, 

 the red darker, surface highly polished, the spines blue-black, shining ; 

 those on 2nd row .12 inch long, and more porrected, the others but .04 

 inch ; head brown-black, red behind the vertices. To next moult 2 to 5 

 days. 



After 4th Moult— Length just after this moult .7 inch ; 24 hours after 

 same .9 in., and in 3 days reached maturity. 



MATURE LARVA— Length 1.2 inch ; cylindrical, slender, of nearly 

 even size, the last 4 or 5 segments tapering but slightly  each segment 

 rounded ; color orange-ochre, the surface smooth, polished ; striped 

 longitudinally with black, which is almost concealed by the white spots 

 which cover it ; two of these stripes are sub-dorsal, and on each side just 

 above the spiracles is another ; usually there are five white spots between 

 each pair of spines ; over the feet is a macular white stripe ; on medio- 

 dorsal line on segments 4 to 12 is a small white elongated spot, edged 

 with black, one on summit of each segment ; the spines are in six rows, 

 two sub-dorsal, standing on the black stripes and running from 2 to 13 ; 

 one on each of the lateral stripes, and running from 5 to 13 ; but in line 

 with these is a spine placed between 2 and 3, and another between 3 and 

 4 (no spine on 4) ; the other rows are infra-stigmatal, and run from 5 to 

 12 ; the dorsals on 2 are orange at base, as are also those between the 

 anterior segments, but all others rise from lustrous blue-black conical 

 tubercles, and all spines are blue black, slender, a little thickened at top, 

 and beset thickly with fine short black bristles standing at right angles to 

 the stem ; the spines are of nearly uniform length, measuring .06 inch, 

 except the dorsals on 2, which measure .2 inch ; these are slender, tapering 

 to about four fifths their length and then enlarge into an ovate elongated 

 club ; they are directed forward across top of head, are straight or a trifle 

 bent down, and when the larva is at rest lie. in the plane of the body, and 

 are. divergent ; when the larva moves, it moves its head incessantly from 

 side to side, and these long spines much resemble antennas, but are not 

 flexible, and can only move with the segment ; between this pair of spines 

 is a chitinous black patch, and on the anterior edge of the segment on 



