28 



I may remark that Reichenbach has kept the Bogota and Bolivian 

 Margarornithes apart, but M. de Lafresnaye, who knows both species, 

 considers them identical. It is with Bogota specimens I have been 

 comparing the present bird. 



Alectrurin^ ? 



9. OcTHOECA FUMicoLOR, sp. nov. (Plate CXVII.) 



O. supra fumoso-brunnea, dorso imo rufescentiore : alis caudacue 

 nigris : tectricibus alarum rufo bivittatis, et secondariis ultimis 

 extus rufescente marginatis : superciliis latis et fronte ad nucham 

 ochracescenti-albis : subtus brunnescenti-murina, ventre medio 

 albescentiore, gula quasi dorso concolore, sed pallidiore : rostro et 

 pedibus nigris. 

 Long. totą 6'0, alse 3*5, caudse 30. 



This bird appears to be naturally placed in Dr. Cabanis' genus 

 Octhoeca, of which the type is Octhoeca oenanthoides {Fluvicola 

 (Btianthoides, d'Orb.Voy. pi. 38, fig. 2). 



Other species belonging to this šame group are Octhoeca leucophrya 

 {Fluv. leucophrys, d'Orb. Voy. pi. 38, fig. 1), which the present 

 bird most resembles in colouring ; Octhoeca rujipectoralis {ibidem, 

 pi. 37, fig. 2) ; Octhoeca Lessoni, mihi {Tyrannulus rufpectus, Less. 

 Deser. des Mamm. et Ois. p. 296) ; Octhoeca albidiema (Setophaga 

 albidiema, Lafr. R. Z. 1848, p. 8), and, perhaps, Setophaga cin- 

 namomeiventris, Lafr. R. Z. 1845, p. 80. The three species figured 

 by d'Orbigny are from BoUvia; the three latter, likę the present, from 

 Bogota. They all offer considerable similarity in colours, and pre- 

 sent, so far as I am acąuainted with them, the šame stnicture. M. 

 de Lafresnaye has indicated the existence and affinities of this group 

 in bis article in the ' Revue Zoologique,' 1848, p. 8. All d'Orbigny's 

 species inhabit his third zone of elevation, that is, above 1 1,000 feet 

 above the sea-level, and it is probable, therefore, that the New 

 Grenadian Octhoecce are likewise from the higher regions of the 

 Andes. 



10. EuscARTHMUs AGiLis, sp. uov. (Plate CXVIII.) 



E. supra nigro et pallido brunneo mixtus, pennis plerumęue nigris 

 brunneo marginatis : crista capitis tolius medialiter nigra, late- 

 raliter autem et subtus pallide brunnea : alis nigris, tectricibus 

 rufescente terminatis, secondariis extus palies centibus : cauda 

 unicolore nigra rectricum mediarum apicibus et omnium margi- 

 nibus exterioribus pallescentibus : subtus pallide fulvo-Jlavidus ; 

 capitis lateribus et gutture toto albis nigro variegatis ; pec- 

 tore longitudinaliter nigro flammulato : rostro nigro, mandibula 

 inferioris basi alba : pedibus nigerrimis : tectricibus subalaribus 

 pallide f ulvis. 



Long. totą 4-6, alse 2 '2, caudse 2' 4. 



This bird much resembles Euscarthmtis parulus and E. albicristatus 

 in general appearance, and may, I think, be safely placed in the 



