1873.] MR. SCLATER ON THE GENUS ORNITHION. 577 



b. ventre grisosccnti-albido : tectricibua alarum ochracco marginatis. 



I minor : interseapulio cineraceo 3. incancsccns. 



\ major : interseapulio olivaceo peri'uso 4. obsoktmn. 



1. Ornithion inerme. 



Ornithion inerme, Hartl. J. f. Orn. 1853, p. 35 ; Cab. et Heine, 

 Mus. Hein. ii. p. 57. 



Supra olivaceum, pileo cineraceo perfuso : loris distincte albis : 

 alis caudaque fuscescenti-nigris, illarum tectricibus flavicanti- 

 albo distincte terminatis : subtus pallide flavum, gutture albes- 

 centiore : long, tota 2"2, alee 1*8, caudue 1*1. 



Hab. Guiana. 



Mus. Bremensi, Bernlinensi et P. L. S. 



Obs. Species valde affinis sequenti, seel rostro longiore, cauda 

 breviore et loris distincte albis forsan diversa. 



2. Ornithion pusilltjm. 



Mgiopatis pusilla, Cab. et Hein. Mus. Hein. ii. p. 58 (1859). 



Camptostoma flaviventre, Scl. et Salv. P. Z. S. 18G4, p. 358, et 

 P. Z. S. 1867, p. 577. 



Camptostoma imberbe, Taylor, Ibis, 18G4, p. 86. 



Supra olivaceum, pileo obscuriore, loris pallidioribus : alis cauda- 

 que fuscescenti-nigris, illarum tectricibus flavicanti-albo termi- 

 natis : subtus pallide flavum, gutture albicanliore : long, tota 

 2-2, alee 1'9, cauda V4. 



Hab. Chiriqui (Arce) ; Panama (McClean) ; Western Ecuador 

 {Fraser) ; Cartagena (Mus. Berol.) ; Trinidad (Taijlor) ; Guiana 

 (Mus. P. L. S.) ; Mexiana (Wallace) ; Eastern Peru (E. B~). 



After comparing skins from all these localities in my own and 

 Mr. Salvin's collections, and reference to the typical specimens of 

 Mgiopatis pusilla, I have come to the conclusion that they must all 

 be referred to one species. In fresh-moulted birds the wing-marks 

 are more distinct and the belly much brighter. As the plumage 

 grows older the wing- marks tend to wear off, and the yellow fades. 



3. Ornithion incanescens, 



Muscipeta incanescens, Max. Beitr. iii. p. 898. 



Mgiopatis incanescens, Cab. et Hein. Mus. Hein. ii. p. 58 ; Pelz. 

 Orn. Bras. p. 106 (ex Brasil.). 



Camptostoma imberbe, Scl. P. Z. S. 1857, p. 203 ; et Ibis, 1859, 

 p. 444, pi. 14. fig. 1 ; etCat. A. B. p. 215 (ex Mexico). 



Eupsilostomn pusillum, Scl. P. Z. S. 1860, pp. 68, 283, et 

 Cat. A. B. p. 215 (ex ^Equator, occ). 



Supra cineraceo-olivaceum : uropygio dilutiore, loris albidis : alis 



caudaque obscuris, a/arum tectricibus ochraceo terminatis : 



subtus grisescenti-albidum, olivaceo vi.v tine turn ; campterio et 



subalaribus ochraceis : long, tota 3'7, ala: 1*9, caudec 1-6. 



Hab. Mexico (Salle) ; Guatemala et Nicaragua (Salvin) ; Western 



Ecuador (Fraser) ; S.E. Brazil, San Paulo and Goyaz (Natt.) ; 



Bahia (Max.). ' 



Proc. Zool. Soc— 1873, No. XXXVII. 37 



