136 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Southern Sonora (north to Guaymas on the coast) and southwestern 

 Chihuahua (Batopilas, etc.). 



Carpodacus frontalis rlwdocolpus (not Carpodacm rhodocolpus Cabania) Belding, 

 Proc. U. S. Nat. Mus., vi, 1883, 343 (Guaymas, Sonora). 



Carpodacus frontalis {not Fringilla frontalis Bay) Salvin and Godman, Biol. Centr.- 

 Am., Aves, i, 1886, 421, part (Guaymas). 



CARPODACUS MEXICANUS RUBERRIMUS Ridgway. 

 SADfT LTJCAS HOUSE FINCH. 



Similar to C. m. sonoriensis, but wing and tail shorter and bill 

 larger. 



Adult mafe.— Length (skins), 128.27-148.08 (135.13); wing, 72.14^ 

 74.93 (73.91); tail, 66.39-62.99 (58.93); exposed culmen, 10.16-11.18 

 (10.67); depth of bill at base, 9.65-9.91 (9.78); tarsus, 16.76-17.53 

 (17.27); middle toe, 12.70-13.46 (12.95).^ 



Adndt female.— L&ngth (skins), 119.38-129.54 (124.46); wing, 68.58- 

 76.20 (71.63); tail, 60.80-57.40 (64.61); exposed culmen, 10.16-10.92 

 (10.41); depth of bill at base (one specimen), 12.45; tarsus, 17.02- 

 17.78 (17.63); middle toe, 12.70-13.97 (13.21).' 



This is decidedly the smallest of the several geographic forms of 

 Carpodacits mexicanus, only that found immediately across the Gulf 

 of California ( O. in. sonoriensis) closely approaching it in measurements. 

 From the latter this peninsular form differs, so far as I can see, only 

 in its shorter wings and tail and slightly larger bill, the coloration 

 being quite identical. In this latter respect both these allied forms 

 are scarcely, if at all, different from C. m. rhodocolpus, of the south- 

 western border of the Mexican plateau, but their decidedly smaller 

 size will serve to readily distinguish them. 



Carpodacus frontalis (not Fringilla- frontalis Say) Baikd, Proc. Ac. Nat. Sci. Phila., 

 1859, 301, 304 (Cape St. Lucas; crit.) .—Cooper, Orn. Cal., 1870, 156, part(Cape 

 St. Lucas). — Salvin and Godman, Biol. Centr.-Am., Aves, i, 1886, 421, part 

 (Lower California) . 



' Eight spet'imens. 



'^Four specimens. 



