BIRDS OF NORTH AND MIDDLE AMERICA. 



151 



Adult male.— Length (skins), 147-161 (154); wing 104-113.8 

 (109); tail, 67-70.5 (69.4); exposed culmen, 12.5-1-3.5 (13); tarsus, 

 19-21.5 (20.2); middle toe, 14-14.5 (14.4).« 



Adult female.— Length (skins), 149-155 (152); wing, 101.6-108.4 

 (104.9); tail, 62.2-68.6 (66.5); exposed culmen, 12.5-13 (12.7); tar- 

 sus, 19.5; middle toe, 14.5-16 (15. 2).^^ 



San Pedro Martir Mountains, noi'thern Lower California, and 

 northward to mountains of San Diego and southern Los Angeles 

 counties, California, and along the eastern slope of the Sierra Nevada 

 as far as Mount Lassen.'^ 



Sialia (He.cimna (not of Swainson) Baird, Review Am. Biixls, 18G4, G3, part (San 

 Diego, California). — Ridgway, Bull. Essex Inst., v, 1873, 189 (c. base Sierra 

 Nevada; crit.); vii, 1875, 12 (Carson, Nevada, resident); Orn. 40th Parallel, 

 1877, 402 (Carson, valley of Carson R., and Big Bend of Trnckee R., Nevada, 

 resident). 



o Four specimens, the wing-measiu-ement representing extremes and average of 

 forty-one specimens. 



t> Two specimens, the wing and tail measurements representing extremes and aver- 

 ages of eighteen specimens. 



c California specimens are not typical of this form, but are much nearer to it 

 than ioS. m. occidentalis, from which they differ in larger size, more restricted areas of 

 chestnut (though this character varies greatly in both forms), and, on the average, 

 decidedly richer or more violaceous hue of the blue. Twelve adult males, taken 

 during the breeding season, in the Laguna Mountains, San Diego County, and one from 

 Nachoguero Valley, Lower California (near the boundary line), all have more or 

 less of chestnut on the back and that of the under parts extends uninterruptedly 

 across the chest, but otherwise are identical in coloration with typical S. m. anahcls' 

 from the San Pedro Martir Mountains and are equally large. An adult male from 

 Alhambra, Los Angeles County, and several from the eastern slope of the Sierra 

 Nevada, are in all respects identical in coloration with San Pedro Martir examples, 

 even that from Mount Lassen, at the northern end of the Sierra range, having a mere 

 trace of chestnut on sides of back and the chestnut of under parts either interrupted 

 by blue in middle of chest or else the two lateral areas barely confluent. 



Average measurements of series from the San Pedro Martir Mountains, San Diego 

 and Los Angeles counties, and the east slope of the Sierra Nevada, together with those 

 of S. m. occidentalis, are as follows: 



Locality. 



Four (wing of fort>-one) adult males from San Pedro 

 Martir Mountains 



Ten adult males from San Diego County, etc Ill 



Five adult males from eastern slope of Sierra Nevada . . 

 Ten adult males of S. in. occidentalis 



Two (wing and tail of eighteen) adult females from San 



Pedro Martir Mountains 



Eight adult females from San Diego County 



Ten adult females of S. m. occidentalis 



posed Tarsus, ^'^f ' 

 culmen. ' ^°^- 



13 20. 



12.7 I 20.7 



12.6 21.1 



12.2 I 20.1 



12.7 I 19.5 

 12.6 j 21.1 

 12.6 I 20.6 



15. 2 

 15.5 

 15. G 

 15. 1 



15.2 

 14.9 

 15.1 



