One Coalburgh _Alope_; length .8, br. .24 inch; bright yellow-green, covered with the lighter specks and patches, but not so as to obscure the ground; the wing cases clouded with darker green in long stripes; the three yellow dorsal bands as in the _Alope_ last mentioned; edges of head, wing cases and mesonotum cream color. This produced a female butterfly, with broad yellow band and like the parent. Another Coalburgh _Alope_, length .6, br. .22 inch; like the foregoing, being both banded and clouded. Produced a female butterfly, with broad yellow band. One Hunter _Nephele_, B; color yellow-green, bands and clouding of wings present but indistinct. Produced a female. Three Hunter _Nephele_; all yellow-green, with no bands or clouding; the edgings cream color. These all gave males. The chrysalis described CAN. ENT., ix., 143, produced a female, but showed no band or clouds; the edgings cream color. Two Illinois examples; length .6, br. .22 inch; color a pale blue-green, the powdery covering giving a whitish hue to the whole; no bands or clouds; the edges of mesonotum, head and wing cases white. Both these gave males. I obtained no females from this lot. Summary as to chrysalids: The largest _Alope_ and Hunter _Nephele_ were alike in color and in dorsal stripes, clouds on wings, and edgings of head case, etc.; but the bands and clouds were most distinct in _Alope_. All these large chrysalids produced female butterflies. The plainer and smaller chrysalids were male. But one female _Nephele_ chrysalis is recorded as without clouds or bands. The Illinois chrysalids were of same shape as the rest, but were small and plain colored, and were blue or whitish-green; the edgings white instead of cream color. They were readily to be distinguished from any other. Results in butterflies: The chrysalis A, Albany _Alope_, gave a male not differing from many males taken at Hunter, and which there I always regarded as true _Nephele_, though off type, being without band, but with a narrow yellow nimbus about the ocelli and connecting them, the edges everywhere fading into the black ground. On the other hand, the chrysalis B, Hunter _Nephele_, gave a typical female _Alope_, with a broad and clear yellow band. The female which emerged in 1877 from the Hunter _Nephele_ before spoken of had both ocelli surrounded and connected by yellow, and stood midway between the types of the two forms. The two chrysalids from Illinois, as I have said, gave males; one wholly dark, the irides without rings; the other had a faint russet nimbus about them, and over the intervening space was a tint of russet. The Coalburgh chrysalids produced typical _Alope_, with broad yellow bands, and like the females which laid the eggs. Therefore outside the belt of dimorphism _Alope_ produced _Alope_, but inside the belt _Alope_ produced _Nephele_ and _Nephele_ produced _Alope_. In conclusion: