TL;DR: Three species in a complex Neotropical group of the genus Chrysobothris, including C. chiriquita Obenberger, new status, C. ichthyomorpha Thomson, and C. thomsoni Waterhouse are discussed in detail and figured.
Abstract: Xenorhipis bajacalifornica Westcott, new species, from Baja California Sur, Mexico, is described and figured. A description of Mastogenius cyanelytron Westcott, new species, herein is necessitated by the fact M. cyanelytra Westcott is an unavailable name. Three species in a complex Neotropical group of the genus Chrysobothris, C. chiriquita Obenberger, new status, C. ichthyomorpha Thomson, and C. thomsoni Waterhouse are discussed in detail and figured. A lectotype is designated for C. chiriquita. Buprestis transversepicta Kerremans is reported as known only from Mexico and is figured. Notes are provided for an additional 135 species in the genera Acmaeodera, Acmaeoderopsis, Actenodes, Agrilaxia, Agrilus, Buprestis, Chalcophora, Chrysesthes, Chrysobothris, Colobogaster, Euchroma, Eudiana, Euplectalecia, Hiperantha, Hippomelas, Jelinekia, Knowltonia, Lampetis, Mixochlorus, Paragrilus, Pelecopselaphus, Polycesta, Spectralia, Tetragonoschema, and Thrincopyge.
TL;DR: The chryso bothrine genus Knowltonia Fisher is resurrected and discussed in connection with the closely related genera Chrysobothris Eschscholtz and Sphaerobothris Semenov-Tian-Shanskij & Richter.
Abstract: The chrysobothrine genus Knowltonia Fisher is resurrected and discussed in connection with the closely related genera Chrysobothris Eschscholtz and Sphaerobothris Semenov-Tian-Shanskij & Richter. Knowltonia is reviewed, with K. calida (Knull) being elevated to a full species and a key to described species is given. Chrysobothris socialis Waterhouse is recognized as polytypic, with C. socialis apache Westcott and Barr, new subspecies, described from Arizona and northern Mexico. Acmaeodera audreyae Westcott and Barr, new species, is described from southern California and is related to A. inopinata Barr.