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Northern Prairie Wildlife Research Center

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Caterpillars of Eastern Forests

Ilia Underwing (Catocala ilia)

JPG-Photo of Ilia Underwing

Large, mottled, highly variable in coloration, ranging from mostly black to green; venter rendered in rose and pink. Back of head with broad black stripe extending over top, offsetting pale areas across front of head capsule. Fifth abdominal segment only slightly humped. Abdominal segments with dorsal setae on raised orangish warts; those of eighth segment decidedly higher. Fringe short and stubby. Food: oaks. Caterpillar: May to June; 1 generation.

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