BIEDS OF NORTH AND MIDDLE AMERICA. 135 



C.[arpodacus'] rhodocolpus Cabanis, Mus. Hein., i, Aug., 1851, 166 ("Mexico," 



i. e., Cuernavaca, Morelos;^ Berlin Mus.). 

 Carpodacus mexicanus (not of Fringilla mexicana Miiller) Salvin and Godman. 



Biol. Centr.-Am., Aves, i, 1886, 422, part (Guadalajara, Jalisco; Durango; 



Guanajuato). 



CARPODACUS MEXICANUS SONORIENSIS Ridgway. 

 SONORAN HOUSE FINCH. 



Similar to C. m. rhodocoJjnis but decidedly smaller and coloration 

 averaging paler, the back more grayish, and the streaks on under parts 

 narrower. 



Adult 7n«Ze.— Length (skins), 129.54-142.24 (135.64); wing, 73.66- 

 76.71 (75.95); tail, 58.42-63.50 (60.96); exposed culmen, 9.91-11.43 

 (10.16); depth of bill at base, 8.38-9.91 (9.40); tarsus, 15.75-17.78 

 (17.02); middle toe, 12.70-14.22 (13.46).'' 



Adult female.— l^^ngth (skins), 119.38-137.16 (132.33); wing, 68.58- 

 75.69 (72.90); tail, 53.34-62.23 (57.91); exposed culmen, 9.65-11.43 

 (10.41); depth of bill at base, 8.89-9.65 (9.40); tarsus, 16.51-18.03 

 (17.27); middle toe, 12.95-13.97 (13.72).^ 



1 Although first named by Cabanis, the latter cites "Bonap. Consp.,p. 533, no. 9, 

 jun." and " Bonap. Schleg. Mon. Lox., p. 15, tab. 16, fig. 1, jun." The name C. rhodo- 

 colpus is cited by Bonaparte as a synonym of C frontalis, but he fortunately gives the 

 exact locality, which Cabanis fails to do. Bonaparte (loc. cit. ) states that the male 

 example of C. rhodocolpus Cabanis is from Cuernavaca (Morelos) and Cabanis cites 

 plate 16, fig. 1 of the Monographk des Loxiens. Keference to the figure in question 

 shows, however, that so far as coloration is concerned it does not represent either 

 C. m. mexicanus or the present form in their typical condition, having the greater 

 extension of red on the under parts of the latter with the restriction of red on upper 

 parts characterizing the former. Possibly the figure is wrongly colored as to the lat- 

 ter respect. At any rate, Cabanis' s description leaves no doubt as to which form is 

 meant, his description being as follows: 



"It is scarcely smaller than the preceding species [C. mexicanus'] and resembles it 

 very much. It differs from it by the shade oi red, which is not poppy red, but 

 resembles the red of C. purpureas very much. The demarcation of the red is less 

 sharp, the crown, the back, and the entire breast being more or less suffused with 

 red. A male of this species is in the Berlin Museum. It was referred to by Bona- 

 parte and Schlegel in their 'Monographie des Loxiens,' but was considered by them 

 to be a young male of C frontalis [i. e. C. m€xicanus']y (Cabanis, Mus. Hein.,i, p. 

 166, footnote; translation.) 



The specimen described by Cabanis was evidently a bird in winter plumage, this 

 form, like all the others, exhibiting a remarkable seasonal difference in the hue of 

 the red. 



^Eleven specimens. 



* Seven specimens. 



Specimens from southwestern Chihuahua (Batopilas) agree in coloration with those 

 from southern Sonora (Alamos and Batamotal) but apparently average smaller, 



