350 Hans Graf von Berlepsch : 



S S jrs., al. 82-76 \, eaud. 61-55%, culm. 20-17f, tars. 

 22^-21 mm. 



Habitat : Peruvia orientalis : prov. Marcapata. 



Typus : in Mus. H. v. B. : S ad. Marcapata, 9th November 

 1899. [Otto Garlepp leg. No. 1440.] 



It is a curious fact that the CMorothraupis of South-eastern 

 Peru has its nearest ally in a species which, as far as we 

 know, is restricted to the forest-region of Costa Rica . In fact, 

 the resemblance between Costa Rican and Peruvian examples of 

 this Ghlorothraupis is so great that Messrs. Sclater and Salvili 

 have not attempted to separate them. 



In the meantime, having (through the kindness of the Hon. 

 W. Rothschild) had an opportunity of comparing live adult 

 birds, collected by Mr. Underwood in Costa Rica, with my 

 specimens from Marcapata, South-east Peru, collected by Mr. 

 O. Garlepp, I have detected some small though apparently 

 constant characters, by which the Peruvian birds may well 

 be distinguished. 



In the latter the lores and the small feathers of the frontal 

 line near the nostrils are yellowish (purer and brighter yellow 

 in the younger and more greenish-yellow in the adult 

 specimens), while in the Costa Rican birds these parts are of 

 the same dark olive-green as the upper part of the head. 



Further, the general coloration of the upper and under 

 parts of the body of the Peruvian birds is of a clearer and 

 purer green, while the Costa Rican birds show a rather more 

 oily or brownish tint in the plumage. The alar margin and 

 the under wing-coverts in the Peruvian specimens are of a 

 clearer or more a yellowish-green colour. The tail is of a 

 rather brighter green or less blackish. 



As a rule the wings and the tail in the Peruvian birds 

 appear to be a little shorter. 



In the Tring Museum there is a young bird of this new 

 form collected by Mr. W. Hoffmanns at Pozuzo, East-central 

 Peru . 



6. Sicalis GOELDii Beri., Bull. B.O.C., vol. XVI.-, p. 97 



(May 1906). 



8. 8. eolumbianae (Cab.) maxime affinis sed major, colore 

 frontis aurantiaco-rubro intensiore usque ad occiput ducto, 



