1866.] COLLECTED ON THE RIVER UCAYALI. 18/ 



elongatis cinerascentibus : alis caudaque niyris ; scapulariioa 

 basibus, tectricum alarium maculis apicalibus et rectricum om- 

 nium apicibus cum toto corpore subtus albis : rostro et pedibus 

 nigris : long, tota 4'5, alee 2"0, caudce 1'5, tarsi 0*8. 

 Hub. in ripis fl. Ucayali inf. 



Obs. Affinis H. melanopogoni, sed ab omnibus affinibus corpore 

 supra nigro subtus albo distinguenda. 



Mr. Bartlett has only sent a single example of this apparently un- 

 described species. 



96. Hypocnemis theresj;, Des Murs, Voy. Casteln. Ois. p. 51, 

 pi. 16. f. 2$. 



Hab. Upper Ucayali. 



Fam. Tyrannid^e. 



97. Attila thamnophiloides (Spix). 

 Hab. Sarayacu. 



98. Fluvicola pica (Bodd.). 



Hab. Upper Ucayali. 



A single skin, apparently referable to this species. 



99. MUSCISAXICOLA FLUVIATILIS, Sp. nOV. 



Murino-fusca, alis nigricantibus, rufo bi/asciatis : caudce tectri- 

 cibus superioribus atris, rectricis extimce pogonio externa albi- 

 cante : subtus valde dilutior, ventre et crisso pure albis; pec- 

 tore et lateribus fulvido perfusis : rostro nigro, mandibnlce in- 

 feriors basi tota albida : pedibus nigris : long, tota 5*3, alee 

 3, caudce 2, tarsi 0"8. 

 Hab. in ripis fl. Ucayali inf. 



Obs. Affinis M. maculirostri, sed rostro breviore et magis crasso, 

 tarsis brevioribus, alarum fasciis distinctis, et ventre albo insignis. 



Mr. Bartlett' s collection contains several examples of this new 

 Muscisaxicola from the Lower Ucayali. It must be placed next to 

 M. maculirostris. See Sclater's synopsis of the genus in 'Ibis,' 

 1866, p. 56. 



100. Todirostrum maculatum, Desm. 

 Hab. Nauta and Upper Ucayali. 



101. Todirostrum chrysocrotaphum, Strickl. Contr. Orn. 

 1850, pi. 49. 



Hab. Upper Ucayali. 



Two examples of this scarce species. 



102. EUSCARTHMUS SPICIFER. 



Todirostrum spiciferum, Lafr. Rev. Zool. 184G, p. 363 ; Sclater, 

 P. Z. S. 1855, p. 67, pi. lxxxiv. f. 2. 

 Hab. Lower Ucayali. 

 As Sclater has already pointed out, this species is quite different 



