Greya subalbaOlle Pellmyr
Wing expanse 11-16 mm. Forewing uniformly white (male) to yellowish white (female). Hindwind light gray, somewhat darker than the forewing.
Comparison with Similar Species
Occasional males of G. solenobiella may very rarely be so light as to cause confusion. The two species show very little, if any, overlap in current range. Tetragma gei coexists with the species in some areas, and is superficially similar; differences are listed under that species.
Host, Oviposition, and Larval Feeding Habits
Feeds on several species of Lomatium (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 drier portions of southern British Columbia and Alberta in Canada. It is common in interior Washington and Oregon, northern Idaho, and western Montana, and may occur as far south as southwestern Oregon.
In dry, forb-rich steppe with Lomatium. Elevational range, 200-1650 m.
Thompson (1986, 1987) used G. subalba and a braconid parasitoid as a model system to explore the evolution of egg dispersal strategies in herbivores using discrete food patches and evolution of host search behavior in their natural enemies.
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.
Thompson, J.N. 1986. Oviposition behaviour and searching efficiency in a natural population of a braconid parasitoid. J. Anim. Ecol. 55:351-360.
Thompson, J.N. 1987. Variance in number of eggs per patch: oviposition behaviour and population dispersion in a seed parasitic moth. Ecol. Entom. 12:311-320.
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University of Idaho, Moscow, Idaho, USA
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Pellmyr, Olle. 1996. Greya subalba http://tolweb.org/Greya_subalba/12329/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/. Version 01 January 1996 (under construction).