252 



M. brasiliensis, and have seen others. They closely resemble the 

 Cayenne bird certainly, but seem to merit separation as much as its 

 four or five other allies, which are now generally admitted as species. 

 My Bolivian bird is nearly equal in size to the brasiliensis ; but the 

 bill is not quite so thick, and narrower and more compressed, and 

 the wings are rather shorter. The plumage above is pure green up 

 to the nape, presenting no tinge of rufous, but a slight bronzy gloss 

 on the neck ; below there is a strong rufous cast, the belly and under 

 wing-coverts being nearly pure pale buff". The head is coloured 

 nearly as brasiliensis, but the blue feathers behind are mixed with a 

 little thalassine. 



A Motmot in the Vienna Museum, which I refer to this same 

 species, was obtained by Natterer in the neighbourhood of Goyaz in 

 Brazil, and I therefore propose to distinguish this bird by the title 

 of M. Nattereri. There are also examples of this species in the col- 

 lections of the Academy of Natural Sciences of Philadelphia and of 

 Mr. Gould. 



5. MOMOTUS SUBRUFESCENS. 



Momotus subrufescens., Sclater, Rev. et Mag. de Zool. 1853, 

 p. 489. 



Supra viridis rufescente tinctus, subtus cinnamomeo-rufescens : 

 pileo medio cum capitis lateribus et macula pectorali nigris ; 

 pileo undique thalassino cincto, sed his pennis thalassinis pos- 

 tice cceruleo terminatis. 



Long, tota 16*0, alae 4*8, Cauda? 9*5, rostri a fronte 1*2, a rictu 

 17. 



Hab. Santa Martha (Verreaux) ; Cartagena (Mus. Berol.). 



Mus. Brit., Ac. Phil, et P. L. S. 



I first described this apparently distinct species of Motmot from 

 some specimens in MM. Verreaux's collection. It approaches nearest 

 to M. bahamensis, but is not nearly so dark below as that bird ; and 

 has the upper back strongly tinged with rufous, which passes off as 

 we descend towards the rump, whereas the upper surface of the other 

 is nearly pure green. There are specimens of a Motmot which I 

 refer to this species in the Berlin and British Museums, and the col- 

 lections of Sir William Jardine and Mr. Gould. 



6. Momotus bahamensis. 



Prionites bahamensis, Sw. An. in Men. p. 332 ; Bp. Consp. p. 68 ; 

 Jard. & Selby, 111. Orn. n. s. pi. 45 ; Bp. Consp. Vol. Anisodact. 



Momotus bahamensis, Gray, Gen. p. 68 ; List of Sp. ii. 1. p. 39. 



Clare viridis, subtus suturate rufo-castaneus : pileo lateribus 

 capitis et macula pectorali nigris : pileo undique thalassino 

 cincto ; occipitis pennarum apicibus cceruleis. 



Long, tota 16*0, alse 5*5, caudse 9"0, rostri a fronte 1*4, a rictu 

 1-85. 



Hab. Bahamas (Sw.) ? ; Tobago (Kirk.) ; Trinidad. 



Mus. P. L. S. 



