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Show 1873.] MR. SCLATER O N T H E G E N U S ORNITHION. 577 b. ventre grisescenti-albido: tectricibus alarum ochraceo marginatis. /minor : interscapulio cineraceo 3. incanescens. [major: interscapulio olivaceo perl'uso 4. obsoletum. 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, caudce 1*1. Hab. Guiana. Mus. Bremensi, Berolinensi et P. L. S. Obs. Species valde affinis sequenti, sed rostro longiore, cauda breviore et loris distincte albis forsan diversa. 2. ORNITHION PUSILLUM. Myiopatis pusilla, Cab. et Hein. Mus. Hein. ii. p. 58 (1859). Camptostoma flaviventre, Scl. et Salv. P. Z. S. 1864, p. 358, et P. Z. S. 1867, p. 577. Camptostoma imberbe, Taylor, Ibis, 1864, p. 86. Supra olivaceum, pileo obscuriore, loris pallidioribus: alis caudaque fuscescenti-nigris, illarum tectricibus flavicanti-albo terminatis : subtus pallide flavum, gutture albicantiore: long, tota 2*2, alae 1*9, caudee 1*4. Hab. Chiriqui (Arce); Panama (McClean) ; Western Ecuador (Fraser); Cartagena (Mus. Berol.); Trinidad (Taylor) ; Guiana (Mus. P. L. Si) ; Mexiana (Wallace) ; Eastern Peru (E. Bi). After comparing skins from all these localities in my own and Mr. Salvin's collections, and reference to the typical specimens of Myiopatis 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. Myiopatis 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, pl. 14. fig. 1 ; et Cat. A. B. p. 215 (ex Mexico). Eupsilostoma 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, alarum tectricibus ochraceo terminatis: subtusgrisescenti-albidum, olivaceo vix tinctum; campterio et subalaribus ochraceis : long, tota 3*7, alee 1*9, caudce 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 |