251 



back of the crown being again edged with black. But it is still 

 larger than that species, the bill oeing stronger, and the wings longer, 

 the hue of the blue on the head is less thalassine, the green of the 

 body below is purer, and the black blotch on the breast is particu- 

 larly large. The single specimen sent is in not quite perfect plu- 

 mage, that is to say, the tail is not yet spatulated ; but there are 

 indications of the commencement of this process. The exact locality 

 in which the specimen was obtained is marked ' Archidona,' which 

 is a small Indian village on the Rio Misagualli, above its confluence 

 with the Napo in the Canton of Quixos. 



3. MOMOTUS MICROSTEPHANUS, Sp. nOV. 



Momotus brasiliensis, Sclater, P. Z. S. 1855, p. 135. 



Clare viridis, collo postico et corpore subtus rufescente tinctis ; 

 spatio verticali medio et lateribus capitis cum macula pectorali 

 nigris : pileo antice thalassino, postice cceruleo lute cincto. 



Long, tota 14*5, alse 4*6, caudse 9"0, rostri a fronte 1*2, a rictu 

 1-8. 



Hab. Interior of New Grenada. 



Mus. P. L. S. 



In my list of Bogota birds I noticed the peculiarities of the M. 

 brasiliensis coming from that locality. Since then I have seen a 

 considerable number of Motmots from that country, and, as they all 

 present similar appearances, I think myself justified in elevating 

 them to specific rank. The dimensions are smaller than in the bra- 

 siliensis, the black space on the head much more confined, the tha- 

 lassine front being much broader and extending nearly to the vertex, 

 leaving only a small black patch between it and the bright blue 

 behind. And the castaneous patch behind the head is wanting, 

 there being, however, in some specimens a brownish-bronze tinge on 

 the upper back. 



As a general rule the species from the mountain ranges of New 

 Grenada are distinct from those of the eastern littoral of South Ame- 

 rica, and I think it seems likely that this Motmot does not form an 

 exception to this rule. 



4. Momotus nattereri, sp. nov. 



Prionites brasiliensis, Lafr. et d'Orb. Syn. Av. in Mag. de Zool. 

 1838, p. 34? 



Supra pure viridis, subtus fulvo tinctus, ventre medio et tectrici- 

 bus subalaribus pure pallide rufescenti-ochraceis : pileo medio 

 et lateribus capitis nigris : pileo <ntti<-c thalassino, j)° s ^ cc 

 cceruleo circumcincto, his pennis cceruleis thalassino mixtis, 

 striga pectorali parva, far (mini no cyanea, medial iter nigra. 



Long, tota 17*0, alse 5\5, caudte 9*0, rostri a fronte 1*4, a rictu 

 1-!), tarsi l'l. 



1 1 <ib. Yungas in Bolivia (d'Orb.) ; Goyaz, Brazil (Natterer). 



Mus. Paris., Ac. Phil., Vindobiensi et P. L. S. 



I have one Bolivian specimen, of what would at first appear to be 



