17. SPEKMOPHILA. 137 



35. Spermophila corvina. 



Spermophila corvina, Scl P. Z. S. 1859, p. 379 ; id. # Salv. Ibis, i860, 



p. 33 ; Scl. Cat. Amer. B. p. 105 (18(32) ; Law. Ann. Lye. N. Y. 



viii. p. 179 (1865) ; Scl. $ Salv. P. Z. S. 1867,p. 278 ; Later. Ann. 



Lye. N. Y. ix. p. 102 (1868) ; Franks. J.f. O. 1869, p. 301; Su- 



michr. Mem. Lost. Soc. N. H. i. p. 551 (1869) ; Scl. $ Salv. P. Z. S. 



1870, p. 836 ; Scl. Ibis, 1871, p. 16 ; Salv. Ibis, 1872, p. 317 ; Scl. 



fy Salv. Nomencl. Av. Neotr. p. 28 (1873) ; Nutting # Ridgio. Pr. 



U.S. Nat. Mus. vi. p. 401 (1884) ; Salv. fy Godm. Biol. Centr.- 



Amer., Aves, i. p. 355 (1885). 

 Sporopliila corvina, Cass. Proc. Philad. Acad. 1865, p. 169. 

 Spermophila badiiventris, Lawr. Ann. Lye. N. Y. viii. p. 171 (1865) ; 



Baird, Trans. Cliicago Acad. i. p. 319, pi. 28. fig. 3 (1869). 



Adult male (type of species). Entirely black, both above and 

 below ; inner primaries white at the base of the outer web, forming 

 a speculum ; under wing-coverts and axillaries white, the coverts 

 along the edge of the wing black : quills blackish below, ashy along 

 the edge of the inner web, and white towards the base of the latter. 

 Total length 4-5 inches, culmen 0-:jo, wing 2-2, tail 1*8, tarsus 0-65. 



The males from all localities, except the Mexican bird described 

 above, have a few white-edged feathers on the centre of the breast, 

 forming a linear streak. 



Adult female. Different from the male. General colour above 

 dark olive-brown ; lesser wing-coverts like the back ; median and 

 greater coverts, bastard-wing, primary-coverts, and quills dusky 

 brown, edged with the same colour as the back ; upper tail-coverts 

 like the back ; tail-feathers brown, edged with olive ; crown of head 

 and sides of neck like the back ; lores and feathers round eye ful- 

 vous ; ear-coverts, cheeks, and under surface of body olive-brown, a 

 little paler on the abdomen, thighs, and under tail-coverts ; under 

 wing-coverts and axillaries white, washed with olive-yellow ; quills 

 below dusky, ashy white along the edge of the inner web. Total 

 length 4-4 inches, culmen 0-4, wing 2-1, tail 1-75, tarsus 0-6. 



The young male is at first brown like the adult female, and 

 gradually assumes the black plumage by a complete moult. 



Bab. Central America, from Mexico to Costa Rica. 



a. Jad.sk. Oaxaca, Mexico, April 1859 Sclater Coll. 



(A. Boucard). (Type of species.) 



b, c. J $ ad. sk. Vera Paz, Guatemala. O. Salvin, Esq. [C.]. 

 d, e. <5 ad. ; Choctum, Vera Paz, Feb. 1862 Salvin-Godman Colli 



/. 2 ad. sk. (O. S. $ F. D. G.). 



g. S ad. sk. Honduras. Sclater Coll. 



h. J jun. sk. Honduras (G. JJlu'tely). Sclater Coll. 



i. $ ad. sk. Chontales, Nicaragua (J. Belt). Sclater Coll. 



k, I. $ ad.sk. Chontales, Nicaragua (J. Belt). Salvin-Godman Coll. 



m,n. <S 2 ad.sk. Costa Rica (J. Curmiol). Sclater Coll. 



o. S ad. sk. Pacuare,Costa Rica, Apr. 5,1867 Salvin-Godman Coll. 



(J. Carmiol; Sm. no. 47425). 



p. 2 ad.sk. Angostura, Costa Rica, Jan. 11, Salvin-Godman Coll. 



1867 (J. Carmiol). 



q\d ad. sk. Turrialba, Costa Rica (E. Arce). Salvin-Godman Coll. 



r. 6 ad. sk. Turrialba, Costa Rica (E. Arce). Sclater Coll. 



