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Northern Prairie Wildlife Research Center

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Caterpillars of Pacific Northwest
Forests and Woodlands

Malacosoma disstria [Lasiocampidae]


Blue and black; silvery-white dorsal patches bordered in black; a yellow orange subdorsal and lateral longitudinal line also bordered in black; dense white hairs laterally. This species is common on many broadleaf trees, in particular, white oak during May and June. This caterpillar is similar in appearance to Malacosoma californicum but differs in the pattern of the white dorsal markings.


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Return to Photo Key to Species in Group B-2a - Sublateral long, dense hairs

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