22 mr. p. l. sclater on the genus synallaxis. [jan. 6, 



45. Synallaxis albicapilla. 



Synallaxis albicapilla, Cab. J. f. O. 1873, p. 319. 



Oleaginea, pileo summo lactescenti-albo : cauda tota et tectricum 

 alarium marginibus rufis : subtus pallide terreno-fusca, medialiter 

 albescens, gula capite fere concolori : rostro brevi, recto : pedibus 

 crassis : tectricibus subalaribus et remigum marginibus interiori- 

 bus cervinis : rectricibus duodecim: long, tota 6, alee 2 8,caudee 

 rectr. med. 2 - 8, ext. 1*6. 



Hab. Peruvia occ. Maraynioc (JelsM). 



Mus. Varsoviano. 



Sect. d. Species supra unicolores : cauda rotundata, nigro-rufa aut 

 fusco-rufa : gula nigro punctata aut rufo maculata. 



46. Synallaxis humicola. 



Synallaxis humicola, Kittl. Mem. pres. a l'Ac. Petersb. 1830, 

 p. 185, pi. 6 ; Darwin, Zool. Beagle, iii. p. 75 ; Bp. Consp. p. 212 ; 

 Sclater, P. Z. S. 1859, p. 193, 1867, p. 324 ; Cat. A. B. p. 153; 

 Phil, et Landb. Cat. Av. Chil. p. 12. 



Supra cineraceo-fusca : tectricibus alarum minoribus rufis : super- 

 ciliis albis : subtus dilutior, albicantior, gula alba nigro punctata : 

 hypochondriis, crisso et tectricibus subalaribus ferrugineis : cauda 

 nigricante, rectricibus lateralibus in pogonio exteriore rufescente 

 tinctis : long, tota 68, alee 2 - 3, cauda rectr. med. 2*9, ext. T9. 

 Hab. Chili, near Valparaiso {Darwin); Valparaiso (D'Orb. et 

 Gaudichaud in Mus. Paris). 



47. Synallaxis orbignii. 



Synallaxis humicola, D'Orb. Voy. Ois. p. 245, t. 17. fig. 2 ; Burm. 

 La-Plata Reise, ii. p. 468. 



Synallaxis crassirostris, Landb. J. f. O. 1868, p. 401. 



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



Synallaxis orbignii, Scl. et Salv. P. Z. S. 1867, p. 986. 



Supra cineraceo-fusca, alarum tectricibus et secundariis extus rufis : 

 /oris albidis : subtus lacteo-alba : gula media rufa : hypochondriis, 

 crisso et subalaribus necnon secundariorum dimidio basalt rufis : 

 cauda media nigra, rectricibus duabus utrinque lateralibus et his 

 proximarum basibus rufis: long, tota 6'5, alee 2*6j cauda? 3. 



Hab. Bolivia, Palca (D' Orb.) ; Rep. Arg. Mendoza ( Weisshaupt) ; 

 Parana (Burm.). 



Obs. Sp. a prsecedente guise macula, secundariorum basibus rufis 

 et rectricibus lateralibus rufis prorsus distinguenda. 



Although D'Orbigny collected at Valparaiso specimens of the true 

 S. humicola, the species figured under that name in his work is 

 clearly distinct, as was first pointed out by Reichenbach. 



I have compared one of D'Orbigny's skins of this species in the 

 Paris Museum (collected at Cochabamba in 1834, and marked " S. 

 humicola") with a specimen in my own collection obtained near Men- 

 doza by Weisshaupt. I therefore do not doubt that I am correct in 

 referring Landbeck's S. crassirostris (established on examples from 

 the same locality) to this species. 



