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18 January 1985
Vol 227, Issue 4684

About The Cover

Hawkmoth, the white-lined sphinx (Hyles lineata), visiting a light pink individual of scarlet gilia (Ipomopsis aggregata) during a nocturnal foraging bout. Individual plants and populations of scarlet gilia shift from darker to lighter corolla colors during the flowering season, permitting plants to track different floral color preferences of the changing pollinator species. See page 315. [Ken N. Paige, Department of Biological Sciences, Northern Arizona University, Flagstaff 86011]