Northern Prairie Wildlife Research Center
Wingspan 4.2 cm. Forewing is strongly falcate, mottled pale yellow to brown, with three narrow, black lines and an apical orange patch. This geometrid is widely distributed in wet forests in western North America. Moths fly from early spring to midsummer. Caterpillars feed on the foliage of maple (Acer), alder (Alnus), and birch (Betula).
Similar species: Besma quercivoraria is smaller, forewing without an orange apical patch, caterpillars feed on foliage of oak (Quercus).
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/insects/macronw/60.htm
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Page Last Modified: Thursday, 03-Aug-2006 11:39:25 EDT
Reston, VA [vaww54]
