Pachybrachis chaoticus Fall, 1915

Barney, Robert J., 2023, Redescriptions of the Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of Arizona, Including New Synonymies, State Records, Plant Associations, and Descriptions of New Species: The Robust Species, The Coleopterists Bulletin 77 (3), pp. 439-459 : 441-442

1. Pachybrachis chaoticus Fall, 1915

Pachybrachys chaoticus Fall 1915: 367 . Pachybrachis chaoticus : Riley et al. 2003: 156 (catalog); Barney 2021b: 5 (taxonomy).

Remarks. Fall (1915) described P. chaoticus from specimens collected in Arizona. Consult Barney (2021b) for a species description, figures, specimens examined, and distribution map.

Additional Specimens Examined. 18 specimens. USA: ARIZONA: Cochise Co., San Simon Road, 8 mi N Portal, 4,550′, 32°00′18″N 109°10′45″W, 16.vii.2001, blacklight, S. Lingafelter [1♂, USNM]; Middlemarch Road , Milepost 3, 4.8 km NE of Hwy. 80, 1,370 m, 31°45.674′N 110°03.019′W, night beating, S. Lingafelter [1♂, USNM]; Geronimo Trail, 11.3 km E of Douglas, 1,320 m, 31°21.042′N 109°23.920′W, 2.v.2017, ex Prosopis, N. E. Woodley [1♀, USNM]; Portal , 4,700 ft., 20.vi.1964, at light, [2♂♂ 1♀, AJGC]; Gila Co. , Globe, Icehouse Canyon, 2.vi.1962, ex Mimosa, G. H. Nelson [3♀♀, AMNH]; Graham Co. , Aravaipa Canyon, 3,050′, 24.viii.1974, UV light, D. S. Chandler [1♀, UAIC]; Pima Co. , Tucson, 29.vi.1989, lite, C. A. Olson [1♂ 2♀♀, UAIC]; Brown Canyon, Baboquivari Mts. , 28.vii.1983, Werner and Olson [1♀, UAIC]; Sabino Canyon, 3,200′, 1.ix.1977, C. Bellamy [1♀, AJGC]; Pinal Co. , Owl Head Buttes, 14 mi E of Picacho Peak, 2,765 ft., 32°34.603′N 111°07.704′W, A. J. Gilbert and N. J. Smith [2♂♂ 1♀, AJGC] .