Proceedings of the Scientific Meetings of the Zoological Society of London 1867

Page 817

756 MESSRS. SCLATER AND SALVIN ON [June 27. (59.) THAMNOPHILUS MURINUS. Thamnophilus murinus, Natt. M S . sp. no. 923. Xeberos. Specimens of both sexes of this species, of which Sclater has three examples in his collection under Natterer's M S. name. They may be characterized as follows : - Schistaceus, subtus valde dilutior, ventre medio peene albo : ma­cula dorsi medii celata alba : alis fuscescenti-ochraceis, macu­lis tectricum terminalibus albis: cauda schistaceo-nigra, api­cibus rectricum anguste albis : long, tota 5*3, alee 2 4, caudce 2*1, rostri a rictu 0*8. Fcem. Fusca; subtus dilute ochracea, medialiter albescens: pileo alis et cauda rufescentibus.- maculis tectricum terminalibus ochracescentibus. Hab. Cayenne (Mus. P. L. S); Marabitanas et Barra do Rio Negro (Natterer); Xeberos (Bartlett). Obs. Species parva; affinis Th. ceerulesceuti et Th. amazonico, sed sane distincta. (62.) DYSITHAMNUS SCHISTACEUS, D'Orb. Yurimaguas and Chyavetas. This appears to be the true Tham­nophilus schistaceus of D'Orbigny (figured Voy. t. 5. f. 1 under the name Th. fuliginosus); but it is not the same as the species referred to by Sclater in his articles in P. Z. S. (1858, pp. 66, 222) and American Catalogue. The latter is distinguishable by its white dorsal spot, darker cinereous colour below, and the narrow white terminations of the tail-feathers. For this species, of which one female skin is like­wise in Bartlett's collection, we propose the new name Dysithamnus ardesiacus. (66.) MYRMOTHERULA H^MATONOTA, Sclater, P. Z. S. 1858, p. 235 ; Sclat. et Salv. P. Z. S. 1866, p. 185. Xeberos and Chyavetas. Several specimens of this interesting species, and of each sex. (68.) MYRMOTHERULA CINEREIVENTRIS. Myrmotherula cinereiventris, Sclater, MS. cf . Cinerea, paulo pallidior, unicolor : tectricum alarum apicibus nigris albo terminatis : cauda nigro-cinerea, apice vix palles-cente: long, tota 3*5, alee 2*1, caudee 1*1. 2 • Supra cinerea, capitis lateribus et corpore subtus cinnamomeis. Hab. Cayenne (Mus. P.L. Si); Surinam (C. Bartlett); Rio Napo (Verreaux) ; Eastern Peru, Chyavetas (E. Bartlett). Obs. Species, affinis M. axillari et ejusmodi formae, sed corpore toto subtus cinereo ab aliis prorsus notabilis. Mr. E. Bartlett's collection contains many examples of this spe­cies, which appears to be undescribed. Sclater's collection contains several skins of it from various localities.