NEONYMPHA I. 



irregular hexagons, the sides of which have broad flanks that occupy nearly all 

 the interior, leaving but a light point in centre of each ; color yellow-green. 

 (Fig. a.) Duration of this stage from three to six days, according to the 

 temperature. 



Young Larva. — Length .12 inch; cylindrical, a little thickest in middle, 

 tapering very gradually to 13, which ends in two conical tails, from the end of 

 each of which proceeds a long bristle, the space between the tails concave ; color 

 yellowish-white ; the upper surface presents six rows of low, conical tubercles, 

 each giving out a short process ; those on upper part club-shaped, slightly thick- 

 ened at extremity ; low on either side is another row, of same thickness through- 

 out ; on 2, 3, 4, the upper processes are 

 nearly in cross line ; on 4 to 12 they are 

 diffei'ently arranged, each three being in 

 triangle, the dorsal one lying on front of 

 the segment, the sub-dorsal at the rear, 

 the other a little before the middle ; on 

 13 there are eight, iu two rows of four, the front consisting of the pair of dorsals 

 and pair of laterals, the hinder row of the dorsals and sub-dorsals, besides a pair 

 of sub-dorsal long bristles in the rear, and a pair of short ones in the concavity 

 between the tails ; in the lower row, on each segment from 2 to 13, are two 

 shorter processes, nearly in horizontal line, the hinder one always a little below 

 the other ; on 7 to 10 each, and on 13, over the pro-legs, is a pair of very 

 short hairs, in horizontal line; head one half broader than 2, bi'oad as high, 

 flattened frontally, a slight angular depression at top ; on each vertex, a coni- 

 cal, divergent horn, somewhat curved forward, in three sections, each smaller 

 at the junction than the top of the next below ; at the end a bristle, and another 

 on the middle, on the inner side ; a few shorter ones scattered over face ; color of 

 head and horns black-brown. In about two days from the egg the color gradually 

 changes to pale green, and stripes appear, a white sub-dorsal, and two on mid-side. 

 (Fig. b, b'^.) Duration of this stage, six days in April, August, and October. 



After first movdt : length .18 inch ; nearly the same shape, somewhat thicker 

 in middle, the dorsum more arched ; the tails longer, more slender, and brown- 

 tipped ; each segment five times creased, and on the ridges so caused a row of 

 white tubercles, irregular, conical, each with a short white hair ; color dark 

 green, marked longitudinally by white ; on mid-dorsum a clear green stripe, and 

 the ground on either side of it is whitish, owing to the numerous tubercles there ; 

 on the verge of dorsal area a white stripe, another along base of body, and 

 between these, on side, are two contiguous white lines ; under side bluish-green. 



