98G MESSRS. SCLATKR AND SALVIN ON PEUXJVIAN BIRDS. [DcC. 12, 



21. Synallaxis orbignii (Reich.). 



Si/nallaxis humicola, Lafr. et D'Orb. Mag. de Zool. 1830, p. 24 ;. 

 D'drb. Voy. Ois. p. 24.5, t. 1/. f. 2. 



Bathmidurus cf orbignyi, Reich. H. d. Sp. Orn. p. 163. 



Sj/nallaxis crassirostris, Landb. J. f. O. 18f)5, p. 401. 



This species has been wrongly referred by Lafresnaye and D'Or- 

 bigny to the S. humicola of Kittlitz. It is readily distingnishable on 

 comparison by its thicker bill, rnfons throat-spot, and the clear rufous 

 colour of the outer webs of the external tail-feathers. D'Orbigny's 

 specimens were from the ravine of Palca, Western Bolivia. Those 

 described by Landbeck as S. ci-assirostris were obtained by Leybold 

 in the vicinity of Mendoza. Mr. Whitely sends us two examples 

 from Arequipa. Sexes (as marked) alike. 



22. OcTHoiicA leucophrys. 



Fluvicola leucophrys, Lafr. et D'Orb. Syn. Av. in Mag. de Zool. 

 1837, p. 60 ; D'Orb. Voy. p. 345, t. 38. f. 1. 



Octhoeca leucophrys, Sclater, P. Z. S. 18.56, p. 28 ; Cab. et Hein. 

 Mus. Hein. ii. p. 48, 



Two examples of this fine species from Islay aud Chihuata. " Eyes 

 dark hazel ; bill and feet black." In Sclater's 'Catalogue' Fluvi- 

 cola leucophrys is wrongly referred to a very diiferent bird — the 

 Tyrannula setophagoides of Bonaparte. 



23. MUSCISAXICOLA albifrons. 



Ptyonura albifrons, Tsch. F. P. p. 167, t. 12. f. 2. 



Muscisaxicola albifrons, Ph. et Landb. Wiegm. Arch. 1865, p. 7S. 



One example of this bird from Salinas shows that Sclater has been 

 in error in uniting it to Tcenioptera alpina, Jard., of Ecuador*. 

 The present species is much larger in size, in fact the giant of the 

 genus t. The upper coloration is also paler, and the head slightly 

 rufescent, instead of being darker than the back. The front is white 

 in M. albifrons, which is not the case in M. alpina ; and the outer 

 webs of the outer tail-feathers are distinctly edged with white. The 

 species from Ecuador will therefore stand as M. alpina (Jard.). 

 The eyes of M. albifrons are noted as " dark hazel." 



24. Muscisaxicola mentalis (Lafr. et D'Orb.). 



Skins from Islay. " Female : eye dark hazel ; legs, toes, and 

 claws black." 



25. Muscisaxicola rubricapilla, Ph. et Landb. (PI. XL VI,) 



Muscisaxicola albilora, Lafr. Rev. Zool. 1855, p. 60 (?). 

 Muscisaxicola rubricapilla, Ph. et Landb. Wiegm. Arch. 1865, 

 p. 90; Sclater, Ibis, 1866, p. 58. 



Supra fuscescenti-cinerea, loris et reyione oculari alhescentibus ; 



* See P. Z. S. 1860, p. 78, and Ibis, 186(], p. 57. 

 t M. albifrons : long, tota 9'0, alas 6-0, caiida; 3'8. 

 M. alpina: „ 68, „ 5-0, „ 3-1. 



