13-4 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CARPODACUS MEXICANUS RHODOCOLPUS (Cabanis). 

 CTJERNEVACA HOdSE FINCH. 



Adult male. — Similar to the adult male of C. m. mexicanus., but the 

 red much more extended, with outlines of the different areas less 

 sharply defined ; the occiput, hindneck, and back usually more or less 

 tinged with red (whole pileum sometimes bright red) and the red of 

 under parts extending posteriorly over the breast to the abdomen 

 (sometimes covering the latter also, occasionally tinging even the under 

 tail-coverts);^ length (skins), 133.35-162.56 (145.80); wing, 78.74^83.82 

 (80.52); tail, 55.88-64.77(61.21); exposed culmen, 10.16-11.43 (10.92); 

 depth of bill at base, 9.40-10.67 (9.91); tarsus, 17.53-19.05 (18.03); 

 middle toe, 12.70-14.48 (13.72).' 



Adult female. — Apparentl}^ not distinguishable from that of C. in. 

 mexicanus; length (skins), 136.40-152.40 (141.99); wing, 77.47-80.01 

 (78.74); tail, 57.66-60.45(59.18); exposed culmen, 10.16-10.92 (10.67); 

 depth of bill at base, 9.40-10.16 (9.91); tarsus, 16.76-17.78 (17.27); 

 middle toe, 13.21-14.48 (13.97).'' 



Southwestern portion of Mexican plateau, in States of Morelos, 

 Jalisco (Zapotlan; Mascota; Bolaiios; Talpa; Colotlan), Colima, Mich- 

 oacan (Lake Patzcuaro), Guanajuato, and Durango (Ciudad Durango; 

 Papasquiaro; Guanacevi; Inde). 



Fringilla frontalis (not of Say) Audubon, Orn. Biog., v, 1839, 230, pi. 424 

 (Mexico?*). 



Carpodacus frontalis Duges, La Naturaleza, i, 1868, 140 (Guanajuato; Guadala- 

 jara). — Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 278, part (Guadalajara, 

 Jalisco; Durango). 



Carpodacus mexicanus frontalis Stose, Proc. Ac. Nat. Sci. Phila., 1890, 218 (Lake 

 Patzcuaro). 



Carpodacus frontalis Bonaparte and Schlegel, Mon. Lox., 1850, 15, part, pi. 16, 

 fig. "1" (i. e., upper fig. ). 



\_Carpodacus'\ frontalis Bonaparte, Consp. Av., i, 1850, 533, part (Cuernavaca, 

 Morelos). 



' In the great extension of the red, which characterizes the adult male of this form 

 as compared with that of C. m. mexicanus, C. m. rhodocolpus agrees very closely with 

 the other conspecific forms of western Mexico, C. m. sonoriensis and C. m. ruberrimus, 

 many specimens of the three being practically identical in coloration. In size, how- 

 ever, there is a very marked difference between C. m. rhodocolpus and the above- 

 mentioned allies, the former being nearly if not quite as large as C. m. mexicanus, 

 while the other two are decidedly the smallest members of the group. C. m. rhodo- 

 colpus also averages darker, in both sexes, than either C. m. sonoriensis or C. m. 

 ruberrimus. 



^ Eleven specimens. 



^ Three specimens. 



* See Baird, Rep. Pacific R. R. Surv., ix, 1858, p. 416. The specimen referred to, and 

 doiabtless the original of Audubon's colored plate and description, agrees very closely 

 with examples from Guanajuato and other parts of southwestern Mexico. 



