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Macromoths of Northwest Forests and Woodlands

Rheumaptera subhastata [Geometridae]


JPG-Rheumaptera subhastata

Wingspan 3.1 cm. Forewing is white with black borders and mottled black basal and median areas. This geometrid is widely distributed in western North America. Moths fly during the day in late spring to midsummer. Caterpillars feed on the foliage of alder (Alnus) where they fold a leaf into a tent.

Similar species: Rheumaptera hastata forewing mostly black with a white postmedian band, uncommon but widely distributed; Epirrhoe sperryi (Geometridae) is smaller, occurs in the Rocky Mountain region.


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