BIRDS OF NORTH AND MIDDLE AMERICA. 



457 



32-36 (33.7); onlmon, 12.5-15.5 (U.3); tarsu.s, 13.5-10 (14.9); middle 

 toe, 10.5-12(11.2).^' 



Mountains of western North America and Mexico, in coniferous 

 forests; north to British Colum1)ia (Vancouver Tshmd and interior); 

 south to States of Vera Cruz (Jalapa. Oriza])a, Las \'egas, etc.), Pucbla 

 (Mount Orizaba), Mexico (Mount Popocatepetl; Mount Iztaccihuatl), 

 etc., southern Mexico; east to Montana, Wyomino-, Colorado, New 

 Mexico, etc., casually to northern Nebraska (one specimen). 



Sitta pygmxa Vigors, Zool. Voy. "Blossom," 1839, 25, pi. 4, fig. 2 (Monterey, 

 California). — Bonai>artk, Geog. and Comp. List, 1838, 10. — Audubox, Orn. 

 Biog., Y, 1839, 63, pi. 415; Synopsis, 1839, 168.— Gambel, Proc. Ac. Nat. Sci. 

 Phila., iii, 1846, 112 (Monterey, etc., California; habits; notes). — Sclater, 

 Proc. Zool. Soc. Lond., 1859, 363 (Jalapa, Vera Cruz); Cat. Am. Birds, 1862, 

 15 (Jalapa); Ibis, 1865, 311 (Jalapa, etc.).— Baird, Rep. Ives' Expl. Col. R., 

 pt. V, 1861, 6; Review Am. Birds, 1864, 88. — Feilner, Ann. Rep. Smithsonian 

 Inst, for 1864 (1865), 426 (n. California; habits).— Coues, Proc. Ac. Xat. Sci. 

 Phila., xviii, 1866, 78 (Fort Whipple, Arizona) ; Check List, 1873, no. 41; 2d 

 ed., 1882, no. 61; Birds N. W., 1874, 25; Birds Col. Val., 1878, 139.— Brown, 



« Twenty-two specimens. 



Specimens from different localities compare in average measurements as follows: 



Locality. 



MALES. 



Ten adult males (of S. p. leuconucha) from Sun Pedro 



Martir Mountains ^ 



Two adult males from California 



Five adult males from western Nevada and eastern Oregon 



Four adult males from Colorado , 



Seven adult males from Arizona 



Three adult males from northern Sonora 



Two adult males from northern Chihuahua 



One adult male from southern Chihuahua 



Eight adult males from south-central Mexico 



FEMALES. 



Ten adult females (of .*?. p. leuconucha) from San Pedro 



Martir Mountains 



One adult femule from California 



Six adult females from western Nevada and eastern Oregon , 



Three adult females from Colorado 



Two adult females from Arizona 



Si.x adult females from northern Sonora and Chihuahua .. 



One adult female from southern Chihuahua 



Four adult females from south-central Mexico , 



Wing. 



Tail. 



66.8 



62.2 



63.8 



GG.l 



64.3 



63.5 



65.5 



65 



66.1 



67 



61.5 



63 



63.5 



64.2 



63.3 



63 



64.5 



36.7 



33.2 



34.5 



34.1 



33.9 



33.3 



33.7 



36 



35.1 



35.3 



33 



34 



33.5 



34.2 



33 



33 



34.4 



Middle 

 toe. 



11.5 



12 



11.2 



11.4 



11.6 



11.5 



11.2 



11 



11.5 



11.9 



11.5 



11.4 



U 



11 



11.2 



12 



11.4 



After very careful comparison of the above series, together with many additional 

 specimens, I am not able to discern any obvious difference in coloration acconling to 

 locality. Possibly the Mexican and California specimens have the pileum more 

 decidedly olive (less gray) than those from the Rocky Mountain district and the 

 under parts more pronouncedly buff in winter plumage; but the California series is 

 uuich too small to permit of satisfactory eoiuparisoii. 



