Synetocephalus penrosei Gilbert & Clark (Chrysomelidae: Galerucinae: Luperini), a new species from California, U.S.A.

Synetocephalus penrosei sp. nov. from Monterey County, California, U.S.A., is described and illustrated. Comparisons are made with the two most similar species, S. bivittatus (LeConte 1859) and S. diegensis (Blake 1942). Adults of S. penrosei are associated with Adenostoma fasciculatum Hook & Arn. (Rosaceae) during the spring months when plants are in bloom. [ABSTRACT FROM AUTHOR]