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Northern Prairie Wildlife Research Center

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Caterpillars of Eastern Forests

Spruce Harlequin (Palthis angulalis) [Dark-spotted Palthis]

JPG-Photo of Spruce Harlequin

Small dark brown caterpillar with arched eighth abdominal segment. Anterior abdominal segments with oblique pale stripes that pass through spiracles onto subdorsal areas of adjacent segment; stripe on seventh segment pronounced. Faint-spotted palthis (P. asopialis) with denser, whiter, and more toothlike projections over body surface. Food: forbs, including crops, as well as forest hardwoods and softwoods. Caterpillar: June to November; 2 or more generations in South, 1 in North.

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