^"qo^'^l Oberholser, Revitiv of the Genus Catkerpes. IQ^ 



The specimen upon which Giraud based his description of Cer- 

 thia albi/rons, although a dark, immature bird, with a small bill, 

 agrees best with the form that enters the United States only along 

 the lower Rio Grande, — a conclusion already announced by Mr. 

 Nelson ; ^ but that this type, now in the United States National 

 Museum, came originally from within the present boundaries of 

 Texas, as claimed, may well be doubted, particularly if the results 

 of investigation regarding others of Giraud's reputed " Texas " 

 birds be admitted as negative evidence. 



Catherpes mexicanus polioptilus, subsp. nov. 



Chars, subsp. — Like Catherpes mexicanus albifrotis, but paler above 

 and with a much shorter bill. 



Type locality. — Deer Mountain, Chisos Mountains, Texas. 



Geographical distribution. — From western Texas, through New Mex- 

 ico, Arizona, and northwestern Mexico to Lower California. 



Description. — Type, male adult, No. 168350, U. S. Nat. Mus., Biological 

 Survey Collection; Deer Mountain (opposite Mount Emory to the east), 

 Chisos Mountains, Texas, 6500 feet; H. C. Oberholser. Upper surface 

 grayish brown, becoming rufescent posteriorly, and spotted with darker 

 brown and buffy; rump and upper tailcoverts chestnut; wings fuscous 

 irregularly barred and margined externally with light chestnut; tail pale 

 chestnut, with narrow black bars; ill-defined superciliary stripe dull 

 whitish; cheeks, lower part of auriculars, throat, and jugulum while; 

 abdomen chestnut, sparingly dotted with darker brown. 



Specimens from New Mexico, Arizona, and Lower California 

 are, as a rule, somewhat darker than those from Texas, and though 

 evidently verging more or less toward pimdulattis , apparently 

 belong here. 



Variation, both seasonal and individual, is great in both poliop- 

 tilus and conspersiis. Young birds of these races seem to be 

 darker than adults. 



Catherpes mexicanus punctulatus Ridgway. 



Catherpes mexicanus punctulatus Ridgway, Proc. U. S. Nat. Mus. V, 

 1882, p. 343. 



'Auk, XV, 1898, p. 160. 



