354 CEKTHITD^. 



Adult female. Crown like the back ; lower breast and abdomen 

 wasted with pale buff ; flanks greyish buff ; greater coverts nar- 

 rowl)- tipped with buff and whitish. 



Measurements of five males : — Total length about 6 inches. 



Ciilmen. Wing. Tail. Tarsus, 



in. in. in. in. 



MichiMn 0-7 3-5 1-8 0-75 



Michigan 0-8 3-55 1-9 0-75 



Western Rockj' Mountains 0-9 8-35 1-8 07 



Western Eocky Mountams. ... 0-9 3-55 2-0 07 



Mexico 0-85 3-55 1-8 073 



Obs. The difference between an eastern form (S. carolinensis) and 

 a western variety {S. aculeata) is said to be that the western indi- 

 viduals have the bill slightly larger, and that they have the greater 

 wing-coverts less black than the true S. carolinensis. 



Hah. The White-bellied Nuthatch inhabits nearly the whole of 

 the United States and part of British America, extending its range 

 southwards into Mexico. 



a,b. c? 5 ad. st. North America. Pm'chased. 



c. c? ad. St. Ohio. Dr. Kirtland [P.]. 



d, e. Ad. sk. Michigan. Prof. Steere [P.]. 



/. $ ad. sk. Hyde Park, lUinois. H. K. Ooale, Esq. [P.]. 



g, h. cJ ad. sk. W. side Rocky Mountains. J. K. Lord, Esq. [P.]. 



i-l. $ ad. sk. W. side Eocky Mountains. J. K. Lord, Esq. [P.]. 



m. Imm. sk. California, Lord Walsingham [P.]- 



n. [$]sk. Cahfornia. Lord Walsingham [P.] . 



o. Lnm. sk. Mexico. Gould Collection. 



p. Ad. sk. Mexico. Purchased. 



14. Sitta canadensis. 



Sitta canadensis, Briss. Orn. iii. p. 592, pi. 29. fig. 4 (1760) ; Linn. 

 S. A", i. p. 177 ; Lath. Ind. Orn. i. p. 262 ; Gm. S. N. i. p. 441 

 Nuttall, Man. i. p. 583 ; Audub. Orn. Biogr. ii. p. 24 ; id. ibid, v 

 p. 474, pi. 180 ; id. B. Amer. iv. p. 179, pi. 248 ; Sioains. Class. B 

 p. 318 ; Bp. C. A. i. p. 227 ; Baird, B. N. Amer. p. 376 ; Sclat. Cat 

 Am. B. p. 15; Blahist. Ibis, 1862, p. 5; id. ibid. 1863, p. 67 

 Sclat. Ibis, 1865, p. 311 ; Brotvn, Ibis, 1868, p. 421 ; Baird, 

 Remeio Amer. B. p. 87 (1864) ; Cooper, Orn. Calif, p. 54 ; 

 Baii-d, Brew., (^ Ridgw. Amer. B. p. 87; Coues, Key N. Am. B. 

 p. 83 ; id. Birds Colorad. Vail. p. 136 ; Nehiing, J. f. O. 1880 

 p. 414. 



La Sittelle du Canada, Daubent. PI. Enl. vi. p. 311 (1783). 



La Sittelle a tete noire, Daubent. PI. Enl. vi. p. 313. 



Sitta varia, Wils. Am. Orn. t. 2. fi^. 4 (1808). 



Sitta stulta, VieiU. N. Diet. xxxi. p^. 332 (1819). 



? Sitta melanocephala, Less. Traite d'Orn. p. 316 (1831). 



Adult male. Crown of head, loral region, and a broad streak 

 through the eye, ear-coverts, and part of the sides of the neck jet- 

 black ; the crown almost completely surrounded by a conspicuous 

 white line, which nearly meets with its fellow on the nape ; general 



