270 On some new Species of South -American Birds. 



Cauda tota bruunea dorso fere concolori; rostro plumbeo, 

 pedibus corylinis : long, tota 3*8^ alse 1'8, caudse rotun- 

 datffi rectr. med. 1-7. Feni. Supra bruunea, subtus fulva, 

 alarum tectricibus, sicut in mare, maculatis. 

 Hab. Guiana Britannica [Whitely). 

 Mus. S.-G. et P. L. S. 



Obs. Species inter M. fulviventreni et M. gularem ponenda, 

 ab hac ventre dilutiore et dorso minus rufescente, necnon 

 Cauda longiore, ab ilia colore corporis inferi cinereo diversa. 

 Of this little Ant-bird Mr. Whitely has recently trans- 

 mitted from Bartica Grove, British Guiana, examples of 

 both sexes. Its nearest ally is certainly M. fulviventris of 

 Panama and Western Ecuador ; but we think it not possible 

 to regard it as otherwise than specifically distinct. 



6. Terenura spodioptila, sp. n. (Plate IX. fig. 1.) 

 Supra fusco-cinerea, pileo summo et nucha nigris ; stria 

 superciliari, loris, capitis lateribus et corpore subtus 

 cinereis, gula albicantiore ; dorso toto Isete castaneo, alis 

 nigricantibus, albo distincte bifasciatis, tectricibus alarum 

 miuoribus nigricantibus ; rostri maxilla nigra, mandibula 

 albicante, pedibus plumbeis : long, tota 3" 7, alse 1"95, 

 caudffi 1"5_, rostri a rictu 0'65, tarsi 0'6. 

 Hab. Guiana Britannica [H. Whitely). 

 Obs. T. humerali affinis, sed tectricibus alarum minoribus 

 nigris nee castaneis distinguenda. 



Of this distinct species Mr. Heniy Whitely has sent us a 

 male example from Bartica Grove, British Guiana. In its 

 general coloration it much resembles T. humeralis and T., 

 callinota ; but its greyer tint and black lesser wing-coverts at 

 once distinguish it, the latter in T. humeralis being chestnut 

 and in T. callinota bright yellow. The only other species 

 of the genus with which we are acquainted is T. maculata of 

 South-eastern Brazil. In this species the head and the 

 throat are distinctly striped and the wing-coverts are white. 

 In our ' Nomenclator ' we included another species, Formi- 

 civora caloptera, Sclater (P. Z. S. 1859, p. 142) in the genus 

 Terenura. This on further examination proves to be not a 

 Formicarian at all, but a Tyrant-bird closely allied to Serpho- 

 phagapcecilocerca, and identical with S. leucura, Lawrence (Ibis, 



