'^^76.'] NEOTROPICAL ANATID^, 407 



ducio etlinea utrinque ah oculia ad collum imum descendente 

 nigris; ahs extus carulescenti-schistaceis ; tectricibus et secun- 

 dnriisalbo anguste terminatis, speculo alari aneo-viridi ; dorso 

 poshco cinereo, uropygio fasciolis minutis albis variegato ; 

 subtus rufescenh-ochracea, lineis nigris ornata ; mento, linea 

 ad rostri basin, spatio suboculari cum gutture conjuncto et pec- 

 tore supenore utraque ex parte nigerrimis ; rostroflavo, pedibus 

 rubeUis: long, tota ](i-5, alcB 7, caudcB Ah, rostri a rictu 1-6, 

 tarsi 1-9 Jem. supra ardesiaca, dorsi plumis nigro fiammu- 

 latis; collo et uropygio lineis albis nigrisque vermiculatis : 

 subtus omnino castanea. 

 Hab. Rivers of the Chilian Andes {Bndges, Gay). 

 We are indebted to the researches of Mr. Bridges amone the Chi- 

 han Andes for the discovery of this curious form. He sent home 

 specimens of the present species in 1841, which were described by 

 Mr. (jould before this Society in November of that year. Mr. Brid<re3 

 remarks that it swims and dives against the flow of the ChilTan 

 mountain-torrents with a rapidity truly astonishing. 



2. Merganetta turneri. 



Merganetta turneri, Scl. & Salv. P. Z. S. 1869, p. 600 CPeru) 

 Ex. Orn. p. 199, t. 100, et Nomencl. p. 131. 



Merganetta leucogenys, Scl. & Salv. (nee Tsch.) P. Z. S. 1869, 

 p. io/. 



Supra nigra, interscapulio et scapularihus rufo marginatis ; capite 

 colloque toto albis, linea rostrum cingente, pileo medio in strigam 

 nuchalemproducto et linea utrinque ad imum eollum descendente 

 nigerrimis; ahs extus ccBrulescenti-cinereis ; speculo alari a-neo- 

 viridi ; tectricibus alarum et secundariis albo anguste termi- 

 natis; abdomme nigro, ventre medio fusco variegato; crisso et 

 uropygio nigris, albo minute vermiculatis; Cauda fuscescenti- 

 cinerea unicolori ; tectricibus subalaribus cinereis ; rostra et 

 pedibus obscure rubris : long, tota 16-0, alcB 7% caudae 5-0. 

 rostri a rictu 1-5, tarsi 18, digiti medii cum ungue 2-3. 

 ±em. supra cinerea, lateribus cervicis et uropygio albo nigroque 

 mmute vermiculatis; dorso nigro flammulato ; alis albo bifas- 

 ciatis; speculo alari obscure ceneo-viridi ; subtus fulvo-rufa 

 •unicolor: long, tota 16 0, alee 6 4, caudce 4 0, rostri a rictu 1-35. 

 Jiab. S. Feru; Rivers of the Cuzcan Andes (Whitely). 

 When we first received examples of this bird from Mr. H. Whitely 

 we referred it to the species described by Tschudi as Merganetta 

 leucogenys. Having, however, made a reinvestigation of the group 

 we convinced ourselves that Tschudi's bird is, so far as can be de- 

 cided by his figure and description, inseparable from t\i^ Merganetta 

 Columbiana of New Granada, and that the present species must be 

 regarded as undescribed, being equally distiuct from the New-Gra- 

 nadan form, and from the Chilian Merganetta armata. From the 

 former it differs m its larger size, and black breast and flanks, which 

 are only relieved by some brownish marks in the middle of the belly 

 In the New-Granadan bird, which is well represented in Des Murs's 



