131 



6. FORMICIVORA BREVICAUDA. 



Formicivora brevicauda, Sw., Zool. Journ. ii. p. 148. 



<? . Cinereus unicolor, plaga ovali in gutture et pectore superiore 

 nigra : alis nigricantibus extus cinereo limbatis, harum autem 

 tectricibus nigris albo terminatis : cauda brevi, colore nigro- 

 cinerea, rectricum macula subapicali nigra, ipsarum autem api- 

 cibus albidis : rostro corneo, pedibus nigris. 



$ . Olivascenti-brunnea, subtus clarior, capite subcinereo gutture 

 albicantiore : tectricum alarium apicibus colore dilutioribus. 



Hub. In Brasilia Orientali prope urbem Bahia (Sw.). 



Mus. Brit, et P. L. S. 



Obs. Species ab auctoribus cum F. axillari et affinibus confusa, 

 sed crassitie minore, cauda breviore, colore corporis cinereo unicolore 

 et plaga gutturali ovali bene definita facile dignoscenda. 



7. Formicivora hauxwelli. (PI. CXXVI. fig. 2.) 



Plumbea, subtus paulo dilutior, mento albescentiore : alis nigris, 

 tectricibus omnibus albo terminatis, duas lineas albas formanti- 

 bus ; secundariis dorso proximis extus caudce quoque tectrici- 

 bus et rectricibus ipsis omnibus macula terminali alba prceditis : 

 uropygii plumis laxis, elongatis : cauda brevissima : rostro 

 nigricanti-plumbeo, pedibus fuscis. 



Long. tota3 - 7, al3e2 # l, caudae 9. 



Hab. In Peruv. Orientali (Hauxwell). 



Mus. Brit. 



8. Formicivora cinerascens. 



Formicivora ccerulescensl, Sclater, P. Z. S. 1854, p. 112 (nee 

 Vieill.). 



Pallide cinerascens fere unicolor, subtus dilutior; interscapula- 

 rium basibus albis : alis nigricanti-brunneis cinereo limbatis ; 

 tectricum apicibus albo guttulatis : cauda nigricante, rectricibus 

 omnibus albo terminatis : rostro et pedibus nigris. 



Long, tota 6*0, alee 2*4, caudae 2'2. 



Hab. In Peruv. Orientali, Chamicurros (Hauxwell) et in ripis fl. 

 Napo. 



Mus. Brit. 



Obs. Similis F. caerulescenti ex Brasilia sed rostro fortiore et lon- 

 giore, cauda breviore et sequaliore, colore corporis inferioris dilutiore 

 et campteriis non albis distinguenda. 



I formerly referred this bird to Vieillot's Form, ccerulescens, of 

 which Menetries has given a figure in his ' Monograph of the Myio- 

 therinae,' pi. 6. But a comparison of specimens of both species, 

 which are now in the British Museum, has convinced me that these 

 two birds, though much resembling each other in plumage, are essen- 

 tially distinct, and I have given above the characters by which they 

 may be easily separated. 



The example from Chamicurros, which was part of Mr. Haux- 

 well's fine collection, is not quite mature, and shows brownish colour- 



