At 4th moult all the Illinois _Nephele_, now .7 inch long, showed same peculiarities as at last stage. No other larva of the several lots presented the yellow lines so plainly at the same age, that is, just after the moult; but there were one or more _Alope_ and Hunter _Nephele_ which gave indications of the side line, and this came out more distinctly as the stage progressed. But most were without the side line. Comparing mature larvæ: One Albany _Alope_, length 1.25 inch, greatest breadth .16 inch; color very yellow-green, no yellow side or dorsal stripes or lines. One Coalburgh _Alope_, length 1.6, gr. br. .2 inch; color yellow-green, the side more green than dorsum; a yellow side line, quite indistinct. Hunter _Nephele_, 3 examples; length of one 1.2 inch, gr. br. .15 inch; of another 1.15, br. .16 inch. Two were yellow-green, of same shade as nearly all the Coalburgh larvæ. One was more decidedly yellow, with less green; but in none was there a yellow side stripe or the fine dorsal lines. Illinois _Nephele_, length 1.36, gr. br. .14 inch. Color bright yellow-green, the dorsum more yellow than side; on the side as broad a yellow stripe as the one along basal ridge, and the green dorsal stripe edged by yellow. Summary as to larvæ: The five lots could not be separated before 2nd moult. After that, through the stages to maturity, the _Alope_ from different localities and the Hunter _Nephele_ varied somewhat in the shade of green, being more or less yellow; in some yellow prevailing on dorsum, green on sides; all had the yellow band on basal ridge, either pale or deep colored. If the yellow side line was present, as in some examples it was, it was indistinct, or obsolescent. They varied also in the hairy surface, some having the hairs short and upright, others long and bent down. The Hunter _Nephele_ could not be distinguished from _Alope_ by any permanent character. The Illinois larvæ were deep yellow-green after second moult, and the side stripe was always present and distinct. The hairs were never long and bent. The larvæ were distinguishable from all the others. Comparing chrysalids: One Albany _Alope_, A; length .56 inch, greatest breadth .21 inch; color deep green, covered with smooth specks and patches of a lighter color, but which scarcely affect the general green hue; top of head case, ridge of mesonotum and ventral edges of wing cases cream color. This was the only one I obtained, and it produced a male butterfly. One Hoboken _Alope_, same size and color, and produced a male. One Hunter _Nephele_, length .6, br. .2 inch; was precisely like the Albany _Alope_ in appearance, and produced a male. Another Hoboken _Alope_; color yellow-green, and on the dorsum were three longitudinal yellow bands, one on middle of abdomen, ending at base of mesonotum, the others sub-dorsal, extending from last segment to head. This died before imago.