Greya powelliOlle Pellmyr
Wing expanse 7-12 mm. Forewing in female white, heavily banded with rusty confluent patches into a checkerspot pattern. Male with white to pale gray forewing, lightly suffused with a sparse scattering of light brown scales, pattern obsolescent if present at all. Hindwing paler than forewing in both sexes.
Both sexes resemble G. reticulata but the latter is considerably larger and occurs in more moist habitats.
Feeds on Bowlesia incana (Apiaceae). The female cuts and oviposits into young fruits, and the larva feeds on the developing seeds for the first one or two instars. The life history of later stages is unknown.
Known from the coastal range between the San Francisco Bay area and the San Gabriel Mountains, and in the south-central Sierra Nevada of California.
In dry to slightly moist grassy areas in open oak woodland, particularly at the oak-pine transition. The host plant often grows tucked under Artemisia californica, and these shrubs serve as perch sites for males. Females generally stay on the host, and are rarely seen flying. Elevational range, 300-850 m.
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 powelli http://tolweb.org/Greya_powelli/12323/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/. Version 01 January 1996 (under construction).