Synonyms and other taxonomic changes
(Grossbeck, 1908) (1)
Grossbeck, 1908 (2)
Grossbeck (1908) listed the wingspan 34-38 mm. (2)
Rindge (1978) listed the forewing length. (1)
♂ 15-20 mm.
♂ 18-21 mm.
Grossbeck (1908) original description as Phengommataea spoliata
"Head, thorax, abdomen and fore wings of male dark buff, the head somewhat lighter than the rest; hind wings much paler outwardly, shaded with pale buff. Head and body of female pale straw yellow, hind wings concolorous, fore wings darker. Two broad purplish brown lines cross the primaries, the outer or extradiscal edged externally with pale yellow. Intradiscal line broad, somewhat diffuse throughout, begins on costa over one third out from base and is evenly outcurved to inner margin ending a little farther in on that margin than on costa. A discal spots barely indicated by a heightening in the ground color. Extradiscal line begins on costa a little way in from apex as a narrow line and extends wavedly inwardly, becoming wider as it proceeds, to M2, then forms an outward rectangle and continues obliquely inward, turning out again before reaching inner margin. On secondaries a single broad line concolorous with those on primaries but faint and diffuse begins on the inner edge a little below the middle and extends inwardly curved to center of wing, here it fades out in the male but can be traced as an outward and then inward curve to costa in the female. Beneath, both sexes are uniformly pale creamy yellow on all wings."
Rindge (1978) description is available in PDF. (1)
Holotype from Monterey, California. (2)
The main flight period appears to be April to October. (4)
The larval host is conifers. (1)
Grossbeck, J.A., 1908. New moths of the family Geometridae. Journal of the New York Entomological Society
. 16: 27