[1][2] It is found in southern Canada and the western part of the United States, eastward in the north to Maine.

[3] Young larvae are dingy white, with a tinge of green.

Later instars are pale glaucous to dull salmon.

The pupa varies in colour and marking: in the spring brood, it is commonly dull green, with indistinct lateral yellow stripes; in the fall brood, the dorsum is pale yellow or flesh color, with two fine, indistinct, medio-dorsal lines of lilac color.

The pupa is quite active and irritable, striking about in all directions when meddled with.