154 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



224 (Mogollon Mts., Arizona, breeding); vii, 1890, 264 (Mogollon Mts. ; summer 



res. from lower pine belt to spruce belt). — Lowe, Auk, xi, 1894, 270 (Wet Mts., 



Colorado, breeding up to 9,500 ft.). 

 [Sialia] mexicana Coves, Key N. Am. Birds, 1872, 76, part. — ScL.vrKii and Salvin, 



Nom. Av. Neotr., 1873, 4, part. 

 S[ialia] unexicana Coues, Key N. Am. Bii-ds, 2d ed., 1884, 258, part. — Ridgway, 



Man. N. Am. Birds, 1887, 581, part. 

 S[ialici\ m\exicana\ hairdi Ridgway, Auk, xi, Apr., 1894, 157 (Camp 110, "New 



Mexico"; i. o., Arizona; coll. U. S. Nat. Mus.). — Ooiie.s, Key N. Am. Birds, 



5th ed., i, 1903, 258. 

 Sialin mexirana hairdi American Ornithologists' Union Committee, Auk, xii, 



1895, 166; Check List, 2d ed., 1895, no. 767a.— Ridgway, Man. N. Am. Birds, 



2d ed., 1896, 612.— Mitchell, Auk, xv, 1898, 311 (San Miguel Co., New 



Mexico, breeding up to nearly 10,000 ft.). — Knight, Bull. Univ. Wyom. Agric. 



Ex. Sta., no. 55, 1902, 158 (Sweetwater R., Wyoming, 1 spec). — Swarth, 



Pacific Coast Avifauna, no. 4, 1904, 65 (Iluachura Mts., Arizona, resident; 



crit.). — Bailey (Florence M.), Auk, xxi, 1904, 363 (Upper Pecos, New Mexico 



uplo 10,200ft.). 

 [Sinlia] hairdi Shaupe, Hand-List, iv, 1903, 184. 



SIALIA MEXICANA AUSTRALIS Nelson. 

 NELSON'S BLUEBIRD. 



Similar to S. m. hairdi but still larger," and with the back mostly 

 (sometimes entirely) blue, the chestnut confined to a more or less 

 restricted patch on each side of the interscapular area, and cinnamon- 

 rufous of under parts more extended and slightly paler; adult female 

 much bluer al)ove than that of either S. m.. hairdi or S. in. mexicana, 

 the pileum and hindneck being distinctly grayish blue, the rump, 

 upper tail-coverts, and tail ultramarine or French blue. 



Adult male.— J. encrt\\ (skins), 148-175 (102); wing, 109-122 (116.1); 

 tail, 65-77 (71.1); exposed culmen, 12-13 (12.5); tarsus, 19.5-22.5 

 (21.5); middle toe, 14-16 (15).'' 



Adult female.— Len^ih (skins), 156-164 (161); wing, 1 OS. 5-1 14 

 (110.6); exposed culmen, 11.5-18 (12.4); tarsus, 19.5-22 (20.9); 

 middle toe, 13.5-15.5 (14.6).'^ 



Southern portion of Mexican plateau, in States of Vera Cruz 

 (Jalapa,'* Cordova", Orizaba, Las Vigas), Puebla (Mount Orizaba) 

 Mexico (Mount Popocatapetl), Morelos (Iluitzilac), and Michoacan 

 (Mount Tancitaro; Patamban). 



(?) Sialia mexicana (not of Swainson?) Sclater, Proc. Zool. Soc. Loud., 1856, 293 

 (Cordova,d Vera Cruz); 1859, 362 (Jalapa.rf Vera Cruz); Cat. Am. Birds, 

 1862, 11 , part (Jalapa).(^ 



a The largest of all the forms of this species. 



'' Eleven specimens. 



c Seven specimens. 



d These localities are considered very doubtful by Professor Sumichrast, as well as 

 l)y Messrs. Salvin and Godman, according to whom the specimens so lalieled were 

 almost certainly taken at much higher altitudes. (See Biol. Centr.-Am., Aves, i, 48.) 



