Greya obscuromaculataOlle Pellmyr
Wing expanse 13-17 mm. Body pale ochreous to near white. Forewings with a white base color, and with spots of dark or light brown; sexes are strongly dimorphic, with males having isolated darker patches on a solid background, whereas females have more extensive dark on the forewings, creating fused spots and a checkerspot pattern. Hindwings uniformly gray.
The species superficially resembles G. reticulata and some forms of G. variabilis. It can be distinguished from both by the blunt, short-spined pollex in the male and the presence of large signa in the female.
Unknown, but females often found resting on or near Osmorhiza chilensis (Apiaceae) and Tiarella trifoliata (Saxifragaceae).
Known from southern British Columbia and Alberta in Canada, and from Washington, Idaho, and Montana, USA.
In moist coniferous forest from sea level to 1500 m. It often coexists with G. variabilis and G. mitellae.
Even though this species visits Lithophragma flowers just like G. politella, and drink nectar from the flowers, there is no indication that they contribute to pollination (Pellmyr et al 1996).
Davis, D.R., O. Pellmyr & J.N. Thompson. 1992. Biology and systematics of Greya Busck and Tetragma n. gen. (Lepidoptera: Prodoxidae). Smiths. Contrib. Zool. 524:1-88.
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Pellmyr, Olle. 1996. Greya obscuromaculata http://tolweb.org/Greya_obscuromaculata/12321/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/. Version 01 January 1996 (under construction).