Synonyms and other taxonomic changes
Phaeoura quernaria (J.E. Smith, 1797)
Nacophora Hulst, 1896
There are nine named species of Phaeoura
in America north of Mexico. (1)
Wingspan 37-56 mm; female larger.
Adult: wings powdery light to dark olive brown, with variable white patch at forewing apex, and white edging along black AM and PM lines, at least to costa; female with much broader white areas; blackish melanics common. [adapted from Covell (2005) (2)
Larva: body thickened and robust (short and stout for a geometrid) mottled with browns and grays; head flat, sloping inward; vertex cleft; each spot on head made of 10 to 20 speckles; thorax swollen and humped, darkened above; dorsal paired raised warts on second and eighth abdominal segments, and ventral warts on third; subventral fringe of thickened setae between abdominal and anal prolegs. [adapted Wagner and Giles]
Moth Photographers Group
- large map with some distribution data.
Most records of adults are February to October in the south; shortened season in the north. (1)
Larvae present from June to October; earlier in the south.
Larvae feed on leaves of a variety of deciduous trees: basswood, birch, cherry, elm, hawthorn, oak, poplar, willow.
Two broods in south, one in north; overwinters as a pupa.
in the south-western range - Phaeoura cristifera
Pepper and Salt Geometer
) forewing lacks pale patches along costa
Melanistic individuals resemble a Zale
species (family Erebidae)
Covell, p. 364, plate 54 #2 (2)
description of adult and larva
plus similar species, distribution, food plants (Strickland Entomological Museum, U. of Alberta)
pinned adult images
showing light and dark forms (CBIF)
Caterpillars of Eastern Forests
live larva image plus description, seasonality, generations (David Wagner and Valerie Giles; USGS)
Insects of Cedar Creek, Minnesota
flight season, habitat, food plants