Carpodacus mexicanus nigrescens Griscom Carpodacus mexicanus nigrescens Griscom, 1928: 5 (Miquihuana, Tamaulipas, Mexico). Now Carpodacus mexicanus potosinus Griscom, 1928. See Hellmayr, 1938: 156; Howell et al., 1968: 274; Dickinson, 2003: 754; and Clement, 2010: 585. HOLOTYPE: AMNH 230408, adult male, collected at Miquihuana, 23.35N, 99.46W (Times atlas), Tamaulipas, Mexico, on 10 [not 11] July 1922, by W.W. Brown. From the Leonard C. Sanford Collection. COMMENTS: Griscom cited the AMNH number of the holotype in the original description and noted that he had two males and two females of the form. There are two paratypes at AMNH: Miquihuana, AMNH 230409, male, 5 July 1922; and AMNH 230410, female, 20 June 1922, both collected by W.W. Brown.

Published as part of LeCroy, Mary, 2013, Type Specimens Of Birds In The American Museum Of Natural History Part 11. Passeriformes: Parulidae, Drepanididae, Vireonidae, Icteridae, Fringillinae, Carduelinae, Estrildidae, And Viduinae, pp. 1-155 in Bulletin of the American Museum of Natural History 2013 (381) on pages 72-73, DOI: 10.1206/832.1, http://zenodo.org/record/4611863