572 



M 



R. P. L. SCLATER ON NEW FORMICARIANS. [NoV. 26, 



genus in the neighbourhood of Thamnistes, which I propose to call 

 Neoctantes* . 



Neocfanfcs 



niger. 



Neoctantes genus novum Thamnophilinarum. Habitus generalis 

 Thamnophili, sed rostro compresso, subrecurvato differt. Nares 

 patulee. Culmen rectum, subdescendens, ad apicem paulum in- 

 curvum. Tomiarum liiiea parum ascendens. Gonys recurvus 

 fortiter ascendens. Alee breves, remigibus quinto sexto et sepiimo 

 inter se fere eequalibus et longissimis. Pedes sicut in speciebus 

 minoribus generis Thamnophili. 



Typus et species unica N. niger. 



(5" . Ater unicolor : macula magna interscapuUi celata alba : dorsi 

 plumis laxis elongatis, ad basin nigricanti-cinereis : alis caudaque 

 intus fuscescentibus, rectricum fasciis obsoletis vix apparentibvs : 

 rostro plumbeo, mandibula inferiore partim albicante, pedibvs 

 nigris: long, tota 6"0, alee 2 t), caudce 24, rostri a rictu 08, 

 tarsi 0*9. 

 $ . Mari similis, sed inagis in schistaceum vergens, pectoi-e cinnamo- 

 meo-rufo : plumis dorsi et pectoris ad basin griseo-albis ; remi- 

 gibus ultimis et rectricibus fasciis obscurioribus transversis, parum 

 conspicuis, notatis. 



Hab. Marabitanas, Rio Negro (Natterer). 



Mus. Vindob. et P. L. S. 



My collection contains a single imperfect skin of the male of this 

 rare bird, received in exchange from the Vienna Museum. Natterer 

 appears to be the only collector that has ever met with it. 



3. CeRCOMACRA NAPENSIS. 



Cercomacra cinerascens, Sclater, P. Z. S. 1858, p. 245, et Cat. 

 A. B.p. 184 {err.). 



Cinerea unicolor, alis caudaque nigricantioribus, teciricibus alarum 



* veos (7wr!{s), et Krair/ys" (occisor). 



