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La Rue, D.A. 2016. Natural history, ecology, and conservation of the genus Polyphylla Harris, 1841. 1. New species from the southwestern United States and Baja California, Mexico, with notes on distribution and synonymy. Insecta Mundi 0491: 1-41.

Abstract

Four new species of the genus Polyphylla Harris (Coleoptera: Scarabaeidae: Melolonthinae) from the southwestern United States and Baja California, Mexico, are described and illustrated:

Polyphylla anivallis,
P. koso,
P. morroensis, and
P. socorriana.

Two nomenclatural changes are proposed: Polyphylla ratcliffei Young is placed into synonymy with P. avittata Hardy and Andrews, new synonymy; P. uteana Tanner is removed from synonymy and reinstated as a valid species, reinstated status. The females of P. monahansensis Hardy and Andrews and P. stellata Young are described and illustrated.

New distributional records and ecological associations are amended for P. avittata Hardy and Andrews, P. cavifrons LeConte, P. concurrens Casey, P. crinita LeConte, P. diffracta Casey, P. mescalerensis Young, P. petitii (Guérin-Méneville), and P. rugosipennis Casey.

A checklist of the “Western Clade” species of Polyphylla, north of Mexico, is included.