251 



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

 larger than that species, the bill being 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 paiticu- 

 larly large. The siugle specimeu sent is in not quite perfect plu- 

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

 indications of the eommencement of this process. The exact locaUty 

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

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

 with the Napo in the Cantou of Quixf>s. 



3. MOMOTUS MICROSTEPHANUS, Sp. nOV. 



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



Clare viridis, colio postico et corpore subttis rufescente tinctis ; 

 spalio verticali medio et lateribus capitis cum mncula įiectorali 

 nigris : pileo antice thalassino, postice cccruleo late cincto. 



Long. tota 14"5, alse 4*6, caudae 9'0, rostri a fronte 1*2, a rietu 

 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 Motraots from that country, and, as they all 

 present similar appearauces, 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 confiued, the tha- 

 lassine frout being much broader and extending uearly to the vertex, 

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

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

 there being, however, in some specimeus a browmsh-bronze tinge on 

 the upper back. 



As a general rule the species from the mountain rauges 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? 



Stijjra pure viridis, subtus fidvo tinctus, ventre medio et tectrici- 

 bus subalaribus pure pallide rvfescenti-ochraceis : jiH^o medio 

 et lateribus capitis nigris : ]}ileo antice thalassino, postice 

 caruleo circumcincto, kis pennis ccendeis thalassino mixtis, 

 striga pectorali parva, fere omnino cyanea, medialiter nigra. 



Long. tota 17'0, alaj 5"5, caudae 9'0, rostri a fronte 1'4, a rietu 

 1-9, tarsi Tl. 



Hab. Yungas in Bolivia {d'Orb.^ ; Goyaz, Brazil (Natterer). 



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



I have one Boliviau specimen, of what vvould at first appear to be 



