164 



After fourth Moult: length .8 (all the foregoing measurements are 

 taken at twelve hours from the beginning of the stage, the larva at 

 rest); banded black and pale blue-green, the band in middle of each 

 segment velvety-black, at the junctions dull lustreless black; the spots 

 clear yellow. As the stage proceeds the green has less blue, more 

 yellow, and this shade spreads over the white along base and under 

 surface. In from three to four days the larvae were fully grown. 



Mature Larva. — Length at rest 1.5 to 1.8 inch; greatest breadth 

 .28 inch; cylindrical, stout, somewhat thickened on 3 anci 4; color 

 green, banded with black; on the middle of each segment a broad 

 transverse velvet-black band, generally reaching to base, variable in 

 width and often irregular, sometimes broken on mid-side in two or 

 three of the middle segments; the extreme ends of each segment bor- 

 dered by a velvet-black line or narrow stripe; the junctions dull black; 

 the anterior part of nearly all segments yellow-green, the posterior 

 blue-green ; the light parts of base whitish blue-green ; on under side 

 a broad ventral black band, and the segments 5, 6, 11, 12 are almost 

 wholly black; 2 has near front a compressed square ridge, the top ar- 

 cuate, the corners elevated into low rounded knobs, the top yellow, 

 the knobs and sides orange; before this is the black ridge in front of 

 the scent-organs which shows two yellow cross-bars on summit; 3 has 

 two rounded ridges, between which is the black band; the front ridge 

 yellow, the other divided by the narrow green band; on the remaining 

 secrments to 12 there is but a single broad rounded ridge to each; 13 

 has a broken black bar on dorsum, over the shield, and one bar on the 

 side; over the pro-legs on 7 to 10 are two large rounded black spots to 

 each; on 5, 6, 11, 12 one large, one small; on the sides of each pro- 

 leo-, as also on that of 13 a black spot; feet black, the ground over 

 them black; in the first part of this stage the sub-dorsal and part of 

 the lateral tuberculations are distinctly seen, but at maturity there is 

 merely a slight rounded sub-dorsal elevation on either side of 3, 4, 5, 

 and on II and 12; also on 3 and 4 in each of the two lower rows; on 

 either side are three rows of yolk-red spots, the upper one running 

 from 4 or 5 to 12, the middle row from 2 to 11, in 2 covering the knob 

 on cross ridge; the lower row from 2 to 12; these are placed on the 

 front of the black middle band on each segment, or if the band be 

 broad, near the middle of it; in this last case, they are rounded; but 

 where the band is narrow, a sinus of same color from the front leads 

 to the spot; the spots of sub-dorsal and middle row on 3 and 4 are 

 minute, the first named often wanting on 4 and usually on 3; surface 

 covered with fine short black hairs; head rounded, bilobed, the vertices 

 rounded; yellow in front, yellowish on sides; from the suture at top 

 two black bars pass down, one on front face ending at mandibles, the 

 other down the cheek behind the ocelli; ocelli black on a black patch. 



