257 



Viridis, capite et cervice supra et corpore infra ad medium 

 pectus castaneis : cauda ccerulescenti-viridi : striga lata per 

 oculos ad aures et maculis duabus inpectore nigris. 



Long, tota 14 - 0, alse 4*9, caudae 8*2. 



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

 Dev.) ; Bolivia. 



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

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

 Prince Bonaparte and subsequent naturalists have been in 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 form 

 in the place of Crypticus, because the latter term is in use for a genus 

 of Coleopterous insects, founded by Latreille in 1817. 



2. Prionirhynchus carinatus. (PI. CXXVIII.) 



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

 et R. Z. 1848, p. 249. 



Crypticus carinatus, Bp. Consp. p. 165. 



Supra olivascenti-viridis : fronte juxta marginem maxilla rufes- 

 cente : superciliis cyaneis : taenia a naribus infra oculos ad re- 

 gionem paroticam ducta et pennulis quibusdam 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, tota 14 "0 poll. 

 Hab. Guatimala (Du Bus). 



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 known. 



Genus IV. Eumomota, gen. nov. 



Rostrum Prionirhynchi sed minus carina turn et dilatatum, pau- 

 lum incurvum, mandibularum marginum media solum parte ser- 

 rata : caudce rectricibus decern, harum quinque utrinque ex- 

 timce graduates, ad apicem quadriformes ; medice duce ceteris 

 duplo longiores, magna parte denudatce et spatulis terminates. 



1. Eumomota suterciliaris. 



Crypticus superciliaris, Sandbach, MS 



Prionites (Crypticus) superciliaris, Jard. & Selby, 111. Orn. 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. 



