257 



Viridis, capite et cervice supra et corpore infra ad medium 

 pecfus castaneis : cauda ccerulescenti-viridi : striga lata per 

 oculos ad aures et maculis duabus inpectore nigris. 



Long. totą 14-0, alae 4-9, caudse 8-2. 



Hab. Eastern Peru, wood region (Tsch.) ; Sarayacu {Cast. ^ 

 Dev.) ; Bolivia. 



This bird was first well described by Mr. Leadbeater before the 

 Linnean Society. I have already stated that I tbink it possible that 

 Prince Bonaparte and subsequent naturalists have been iu error in 

 considering Spix's Prionites Martii as intended for this bird, and I 

 have therefore thought it safer to employ for it Leadbeater's name 

 platyrhynchus. 



I have made the new generic term Prionirhynchus for this forra 

 in the place of CrypHcus, beeause the latter term is in use for a genus 

 of Coleopterous insects, founded by Latreille iu 1817. 



2. Prionirhynchus carinatus. (PI. CXXVIII.) 



Prionites carinatus. Du Bus, BuU. Ac. Brux. xiv. pt. 2. p. 108, 

 et R. Z. 1848, p. 249. 



Crypticus carinatus, Bp. Consp. p. 165. 



Supra olivascenti-viridis : fronte juxta marginėm maiillce rufes- 

 cente : superciliis cyaneis .- tcenia a naribus infra oculos ad re- 

 ffionem paroticam diicta et pennulis ąuibusdam pectoris nigris: 

 infra virescenti-rufus, mento viridi-ccerulescente : remigibus 

 fusco-nigris, pogonio externo viridi-ccerulescente : cauda supra 

 viridi-ccerulescente : rectricibus duabus intermediis spatulatis 

 et nigro terminatis : rostro et pedibus nigris, illius apice cornea. 

 Long. totą 14-0 poli. 

 Hab. Guatimala (Z)m Bms) . 



The Vicomte Du Bus has kindly sent me a beautiful figure of 

 this Motmot, from which the accompanying plate has been reduced. 

 I have never seen this bird, and I believe his specimen is the only 

 one knovm. 



Genus IV. Eumomota, gen. nov. 



Rostrum Prionirhynchi sed minus carinatum et dilatatum, pau- 

 lum incurvum, mandibularum marginum media solum parte ser- 

 rata : caudcB rectricibus decem, harum quinque utrinąue ex- 

 timcB graduatce, ad apicem ąuadriformes ; medicB duče ceteris 

 duplo longiores, magna parte denudatce et spatulis terminatee. 



1. Eumomota superciliaris. 



Crypticus superciliaris, Sandbach, MS 



Prionites {Crypticus) superciliaris, Jard. & Selby, 111. Om. n s 

 pi. 18. 



Momotus superciliaris, Gray, Gen. p. 68. sp. 10; List of Sp in 

 B. M. ii. 1. p. 40. 



No. CCCXLIII. — Proceedings of the Zoological Society. 



