3i Mr. C. E. Hellmayr on the 



wing -coverts dull yellowish grey. Upper mandible dark 

 horn -brown, lower brownish white; feet dart horn-brown. 

 Wing 56-581 ; tail 28-30 ; bill 9 mm. 



Remarks. — Adult males from the Upper Rio Negro 

 (S. Pedro, Cocuy, Marabitanas), East Ecuador, and N.E. Peru 

 (Nauta, Pebas) are absolutely identical. All the specimens 

 which I have examined have the light blue cap encircled 

 by a darker, more ultramarine-blue border. The general 

 plumage is always dull brownish black (never deep velvety 

 as in P. velutina), with a faint but distinct violet tinge on 

 the rump and upper-tail-coverts. There is never any trace 

 of the black forehead so conspicuous in P. velutina. 



The female above described is from Olivenca on the 

 Amazons, the locality of P. coronata Spix. Two females 

 from Marabitanas are quite similar, while two from Nauta 

 are rather darker green on the chest. All these specimens, 

 however, agree among themselves in having the under tail- 

 coverts and the middle line of the abdomen very pale dirty 

 yellowish. 



Immature males in which the black feathers are still mixed 

 with some of the greenish feathers of the juvenile plumage 

 differ from those in perfect adult dress in the crown being 

 of a duller, less shining blue. 



P. coronata appears to be confined to the low countries of 

 the Upper Amazons and its northern tributaries. The most 

 westerly point in Peru whence I have seen specimens is 

 Nauta. In the British Museum there is one $ ad. said 

 to be from the " Upper Ucayali/' but it has no collector's 

 label, and I strongly doubt the correctness of the locality. 



Measurements. 



Wing. Tail. Bill. 



J J ad. mm. mm. mm. 



5 : Rio Negro (Natterer) 59-00 26±-30 8-9 



4 : N.E. Peru (Nauta, Rio Tigre) 58 -GO 25-27 8-8^ 



2: East Ecuador •. 58|, 60 28,29 Sh 



$$• 



2 : Rio Negro (Natterer) , 57, 58£ 30 9 



1: Olivenca, Amazons (Halmel coll.) 56 29 9h 



4 : Nauta, Rio Tigre . ." 50^-59 28-29 9 



