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Northern Prairie Wildlife Research Center

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Caterpillars of Pacific Northwest
Forests and Woodlands

Photo Key to Species


Group A-2 -- Species in group A-2 have two or three pairs of midabdominal prolegs, typically two pairs, one pair each on segments A5 and A6. This group consists of a few species of Geometridae and the Plusiinae of the Noctuidae.

Prolegs on A5 smaller than those on A6

Prolegs on A5 same size as those on A6
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