Abstract
The nine species; of Timema Scudder known previously from California, Arizona, and Nevada are redescribed and three new species are added: Timema nakipa from Baja California, Mexico: T. tahoe from Nevada; and T. cristinae from Santa Barbara County, California. Timema nakipa and T. podura Strohecker are the only representatives of Timema known from Mexico. Keys and identification tables are presented for identification of species.

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