

between the two known species. As regards the female, our specimen does not appear to differ 

 in colour from the corresponding sex of Merganetta armata (Des Murs, Icon. t. xlviii). We 

 are not yet acquainted with the female of M. leucogenys, but in all probability it would also 

 bear a similar dress. 



The male bird figured in the accompanying plate, was shot and skinned by Mr. Turner, 

 a friend of Mr. Whitely's, near Tinta. We have, therefore, acceded to Mr. Whitely's request 

 to call it, if new, after his friend's name. The female was obtained by Mr. Whitely himself in 

 the same neighbourhood. Both these specimens are now in the collection of Salvin and Godman. 

 Mr. Whitely sends us no notes as to the habits of this species, but, like the other members of 

 this peculiar form, it is no doubt an inhabitant of the mountain-torrents of the higher Andean 

 ranges, and is an excellent swimmer and diver.* 



If the view we have adopted as to M. leucogenys of Tschudi be correct, the synonymy of 

 the three known species of Merganetta will stand as follows : — 



1. Meeganetta aemata. 



Merganetta armata, Gould, P.Z.S. 1841, p. 95 : Des Murs, Icon. Orn. t. 48 ( ? ). Gray and Mitch. Gen. B. 

 t. 170 : Cassin, in Gilliss' Exp. ii. p. 204 : Scl. P.Z.S. 1867, p. 340. Baphiperus chilensis, Gay, Faun. 

 Chil. Aves, p. 459. Merganetta chilensis, Des Murs, Icon. Orn. t. 5 (J). 



Diagn. Gula et collo antico nigris : interscapulii plumis albo marginatis : abdomine nigro fusco variegato. 

 Sab. Andes of Chili. 



2. Merganetta tueneei. (Ex. Orn. t. c.) 



Diagn. Gula et collo antico albis : interscapulii plumis rufo marginatis : abdomine nigro fusco variegato. 

 Mab. Andes of Southern Peru. 



3. Meeganetta leucogents. 



Anas leucogenys, Tsch. Wiegm. Arch. 1843, p. 390. JErismatura leucogenys, Tsch. E. P. Aves, p. 311, t. xxxvi. 



Merganetta columbiana, Des Murs, Eev. Zool. 1845, p. 179 : Icon. Orn. t. 6. 

 Diagn. Gula et collo antico albis: interscapulii plumis rufo marginatis : abdomine albo fusco sparsim notato. 

 Hob. Andes of Central Peru {Tschudi) : New Granada (Goudot), 



Cf. Bridges, P.Z.S. 1841, p. 95. 



Novembee, 1869. 



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