15. SIPTOENIS. 65 



h' . Rump not rufous. 



rt". Lateral rectrices black at their bases. 17. modesta, p. 66. 

 h" . Lateral rectrices not black at their 

 bases : 



j lat. rectr. brown 18. hvmilis, p. 67. 



lat. rectr. darkish rufous 19. pudibunda, p. 67. 



lat. rectr. -wholl}' pale rufous 20. sordidn, p. 08. 



C. Throat unspotted 21. j'l^tcffonica, p. 09. 



14. Siptornis humicola. 



S}iiallaxis humicola, Kiffl. Mem. pres. a FAc. Petersb. i. p. ItS, 

 pi. 6 (1831) ; Darwin, Zoul. 'Beagle,' iii. p. 75 ; Fraser, P. Z. S. 

 1843, p. 112 (Chili) ; Bp. Consp. i. p. 212 ; Sclafer, P. Z. S. 1859, 

 p. 193, et 1867, p. 324 (Chili), et 1874, p. 22 ; id. Cat. A. B. p. 153 ; 

 Gay, Fauna Vhil., Aves, p. 288; P/iil. et Landb. An. Univ. Chil. 

 xsxi. p. 252 ; Scl. et Salv. Nomencl. p. 64. 



Above cinereous brown, wing-coverts margined with rufous ; 

 superciliaries white ; tail blackish, outer rectrices tipped with 

 brownish : beneath pale cinereous, throat white, with numerous 

 black shaft-spots ; lower belly and flanks more or less ferruginous ; 

 bill and feet black : whole length 6-8 inches, wing 2"3, tail 2-9. 

 Female similar. 



Hub. Chili. 



a,b. 6 9. ad. ; c. Chili {Beed). Sclater Coll. 



Ad. sk. 



d. Ad. sk. Chili. Burnett & Fitzrov [P.]. 



e,f. Ad. sk. Chili {Beed). Salvin-Godman Coll. 



g. Ad. sk. Bolivia ? {Bridges). Sclater Coll. 



15. Siptornis orbignii. 



Synallaxis humicola, d'Orb. Toy., Ois. p. 245, t. 17. fig. 2; Burm. 



La-Plata Beise, ii. p. 468. 

 Synallaxis crassirostris, Landb. J.f. O. 1865, p. 401 (rep. Arg.). 

 Bathmidura d'orbignyii, Beichenb. Handb. d. sp. Orn. p. 163. 

 Synallaxis orbignii, 'Scl. et Salv. P. Z. S. 1807, p. 986 (Peru), et 

 ' 1879, p. 621 (Bohvia) ; iid. Nomencl. p. 04 ; Scl. P. Z. S. 1874, 



p. 22, et 1879, p. 461 ; Salv. Ibis, 1880, p. 358 (Salta, rep. Arg.) ; 



Berl. J. f. O. 1887, p. 132 (Paraguay) ; Scl. et Hmls. Arg. Orn. 



i. p. 183. 

 Synallaxis fugax, Doring, MS. 

 Synallaxis flavigularis, Doring, Exp. al Bio Negro, Zool. p. 45 (?). 



Above pale earthy brown, rump rufous ; superciliaries whitish ; 

 wing-feathers blackish, the basal part of the secondaries pale chest- 

 nut, forming a transverse band ; four middle tail-feathers blackish, 

 the lateral pale chestnut : beneath pale cinereous white ; flanks, 

 crissum, and under wing-coverts pale brown : throat-spot pale 

 rufous : whole length 6"5 inches, wing 2-2, taU 3"2. Female similar. 



Hab. Bolivia and Northern Argentina. 



This species is readily distinguishable from the preceding by the 

 want of the black points on the throat, which in adult specimens 

 carries a rufous spot. 



VOL. XV. F 



