Baltimore Bomolocha (Hypena baltimoralis)
(Photo: Marvin Smith on 5/15/09)
From BugGuide species page:
Identification: Adult: forewing grayish-brown, with whitish tint in female; tint often absent in male. Note blackish-brown apical dash, and large dark patch from base through median area which does not touch inner margin. Dark patch usually has white outer edging. Hindwing dark grayish-brown.
Range: Eastern North America: Nova Scotia to Florida, west to Arkansas, north to Wisconsin and Ontario.
Habitat: Deciduous forests or edges; adults are nocturnal and come to light.
Season: Adults fly from March to October in the south; May to September in the north. Caterpillar seen June to November.
Food: Larvae feed on maples, especially red maple (Acer rubrum).
Life cycle: Two generations per year in the north; two or more in the south.
Other sources and links:
Northern Prairie Wildlife Research Center (caterpillar photo)
Lynn Scott's Lepidoptera Images
Bob Patterson's Images on MPG