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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 B-1a -- Subgroups: Body wall with swellings - Species in group B-1a have the body wall extended into assymetrical swellings, short tubercles, small warts; or a horn on A8.

Middorsal horn absent on A8

Return to Photo Key to Species in Group B-1a
Next Section -- Middorsal horn present on A8

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