150 BULLETIN t)0, UNITED STATES NATIONAL MUSEUM. 



bars or transverse spots; blue of reiniges and rectrices duller, more 

 greenish. 



Adult maZe.— Length (skins), 152-168 (162); wing, 103-118.5 

 (109.6); tail, 65-71.5 (67.7); exposed culmen, 12-13.5 (12.9); tarsus, 

 20-21.5 (20.7); middle toe, 15-16 (15.2).« 



Adult female. —Length, (skins), 151-161 (156); wing, 102-107.5 

 (104.5); tail, 59-66.5 (63.2); exposed culmen, 12-13.5 (12.6); tarsus, 

 20-21.5 (21); middle toe, 14.5-16 (15.3).'' 



Northeastern portion of Mexican plateau, in States of Nuevo Leon 

 (Doctor Arroyo), Coahuila (Saltillo; Carneros; Sierra Guadalupe), 

 Tamaulipas (Miquihuana), San Luis Potosi (Charcas; Villar), and 

 northern A^era Cruz (Cofre de Perote). 



Sialia mexicana Swainson, Fauna Bor.-Am., ii, 1831, 202, footnote (table-land of 

 Mexico). — Bonaparte, Oonsp. Av., i, 1850, 298, part. — Baird, Rep. Pacific 

 R. R. Surv., ix, 1858, 223, part (in synonymy); Rep. U. S. and Mex. Bound. 

 Surv., ii, pt. ii, 1859, 9, part (Saltillo, Coahuila); Review Am. Birds, 1864, G3 

 (do.). — Baird, Brewer, and Ridoway, Hist. N. Am. Birds, i, 1874, 65, part 

 (in synonymy). — Coues, Birds Northwest, 1874, 14, part (in synonymy); 

 Birds Col. Val., 1878, 80 (do.). — Salvin and Godman, Biol. Centr.-Am., Aves, 

 i, 1879, 47, part.— Seebohm, Cat. Birds Brit. Mas., v, 1881, 331.— Ridgw^ay, 

 Auk, xi, 1894, 145, pai't (monogr.; Cofre de Perote, Vera Cruz; Villar and 

 Charcas, San Luis Potosi); Man. N. Am. Birds, 2d ed., 1896, 612, part.— Jouy, 

 Proc. U. S. Nat. Mus., xvi, 1894, 775 (near Charcas, San Luis Potosi.) 



[Sialia] mexicana Gray, Hand-list, i, 1869, 230, no. 3313, part. — Sclater and 

 Salvin, Nom. Av. Neotr., 1873, 4, part. — ^Heine and Reichenow, Nom. 

 Mus. Hein., 1890, 6.— Sharps, Hand-list, iv, 1903, 183, part. 



SIALIA MEXICANA ANABEL.ffi Anthony. 

 SAN PEDRO BLUEBIRD. 



Similar to S. m. mexicana, but with bill larger and stouter; blue of 

 upper parts averaging less violaceous (more ultramarine), back more 

 often mixed with chestnut laterally;'' adult female with back and 

 scapulars grayish brown, forming a definite dorsal patch, distinctly 

 defined against the brownish gray or dull grayish blue of pileum and 

 hindneck, and, with the grayish brown or brownish gray of throat, 

 breast, etc., paler than in S. m. mexicana. 



« Ten specimens. 



& Eight specimens. 



c A series of forty-three adult males from the San Pedro Martir Mountains exhibits 

 the following variation in coloration of the back and under parts: 



With no chestnut whatever on back or scapulars 21 



With the back chiefly blue 18 



With the back about equally blue and chestnut 4 



With the chestnut of the breast divided 30 



With the chestnut of the breast continuous anteriorly 11 



Not belonging strictly to either category 2 



