138 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



(10.41); depth of bill at base, 9.14-10.16 (9.65); tarsus, 16.51-18.03 

 (17.53); middle to.e, 1:^.70-14.48 (13.21).' 



Western United States and Northern Mexico; north to southern 

 Wyoming, southern Idaho, and Oregon; south to Tamaulipas, Nuevo 

 Leon (Monterey), northern Chihuahua (Casas Grandes), northern 

 Sonora, and northern Lower California (as far as Cerros Island); east 

 to western border of the Great Plains (middle Texas to western Kansas 

 and southeastern Wyoming). 



FringUla frontalis Say, Long's Exped. Rocky Mountains, ii, 1823, 40 (Arkansas 



Valley) .—Audubon, Orn. Biog., v, 1839, 230, part. 

 Pyrrkula frontalis Boxaparte, Am. Orn., i, 1825, 49, pi. 6, figs. 1, 2, — Nuttall, 



ilan. U. S. and Canada, i, 1832, 534. 



' Twenty-six specimens. 



Average measurements of specimens from different localities are as follows: 



Locality. 



Wing. 



Tail. 



Ex- 

 posed 

 culmen. 



Depth 

 of bill 

 at base. 



Middle 

 toe. 



MALES. 



Thirty-two adult males from California 



Twenty adult males from Arizona 



Nine adult males from Nevada and Utah 



Twenty adult males from Colorado, Kew Mexico, 

 and western Texas 



FEMALES. 



Twelve adult females from California 



Six adult females from Arizona 



Two adult females from Utah 



Five adult females from New Mexico and western 

 Texas 



78.23 

 78.49 



78.74 



74.68 

 76.20 

 74.93 



58.93 

 68.93 

 69.94 



66.13 

 56.90 

 66.64 



10.41 

 10.92 

 10.16 



10.41 

 10.16 

 10.16 



9.14 

 9.65 

 9.65 



9.91 



9.66 

 10.16 

 9.65 



17.78 

 17.78 

 17.27 



17.53 

 17.78 

 17.78 



13.46 

 13.46 

 13.46 



13.72 



13.21 

 13.21 

 13.97 



With a very good series of specimens for comparison, embracing altogether about 

 one hundred adult males and nearly forty adult females, I am unable to detect any' 

 differences of coloration or proportions that, in my judgment, would warrant the 

 further subdivision of the present form. Selecting from the series of adult males 

 those which have the red most limited in extent, that on the upper surface being 

 strictly confined to the forehead, supra-auricular stripes, and rump, the occiput and 

 back being without any reddish tinge, it is found that they come from San Francisco, 

 Fort Tejon, Santa Barbara, and Argus Mountains, California; Pinal County, Arizona; 

 San Diego, Chihuahua; Salt Lake City, Utah, and Fort Garland, Colorado. Then 

 separating those which have the red most extended , the back being strongly tinged 

 with red and the occiput more or less red, it is found that they represent several 

 localities in California, Fort Bowie and Tucson, Arizona, and Fort Clark and Fort 

 Hancock, Texas. It is thus seen that variation in the extent of the red is not 

 geographical. 



Specimens of the former group have the red areas occasionally as sharply defined 

 as in C. in. mexkmms, but the red is much less intense and the general coloration 

 decidedly lighter and grayer. Extreme specimens of the latter group, on the other 

 hand, are very similar in coloration to C. m. rliodocolpus, except that the brown por- 

 tions of the plumage are paler and grayer, taut they are considerably smaller. 



