464 Zoological Society : — 



tectricibus nigris alba terminatis : cauda brevi, colore nigro- 

 cineretty rectricum macula subapicali nigray ipsarum autem api- 

 cibus albidis : rostro corneOy pedibus nigris, 

 ? , Olivascenti-brunnea, subtus clarior, capite subcinereo gutture 



albicantiore : tectricum alarium apicibus colore dilutioribus. 

 Hab. 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. 



Plumbetty subtus paulo dilutior, mento albescentiore : alis nigrisy 

 tectricibus omnibus albo terminatis, duas tineas albas formanfi- 

 bus ; secundariis dorso proximis extus caudce qunque tectrici- 

 bus et rectricibus ipsis omnibus macula terminali alba prceditis : 

 uropygii plumis laxiSy elongatis : cauda brevissima : rostro 

 nigricanti-plumbeo, pedibus fuscis. 



Long, tota 3*7, alse 2*1, caudae 9. 



Hab. In Peruv. Orientali (Hauxwell). 



Mus. Brit. 



8. FORMICIVORA CINERASCENS. 



Formicivora ccerulescens 1 , Sclater, P. Z. S. 1854, p. 112 (nee 

 Vieill.). 



Pallide cinerascens fere unicolory subtus dilutior; interscapula- 

 rium basibus albis : alis nigricanti-brunneis cinereo limbatis ; 

 tectricum apicibus albo guttulatis : cauda nigricantCy rectricibus 

 omnibus albo terminatis : rostro et pedibus nigris. 



Long, tota G'O, alse 2*4, caudse 2 '2. 



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

 Napo. 



Mus. Brit. 



Obs. Similis F. ccerulescenti 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- 

 thf rinse/ 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- 

 ing beneath and upon the wings. Like F. ccerulescensy this bird has 

 only ten rectrices. 



9. Herpsilochmus pectoralis. 



Cinereus, dorsi medii plumis albo mixtis ; pileo nigro : f route. 



