358 BULLETIN OF THE 



so marked a feature in G. galeala, is so much darker in the present species 

 as to be often clearly distinguishable only in favorable lights. It is most 

 marked on the interscapulars and secondaries. Rostral shield much larger 

 and of a darker red than in G. galeala, and extends further up on the 

 head. Bill, 1.07 ; head, 2.30 ; wing, 8.50 ; tail, 3.75; tarsus, 3.50 ; middle 

 toe, 3.30. 



This species is readily distinguished from G. galeala, its nearest ally, by 

 its much darker colors and very much larger size. The difference in general 

 size between the two is indicated by a comparison of the length of the wing 

 and tarsus. While the folded wing in G. galeala averages about G.50 to 

 6.90, the same measurement in the present species ranges from 8.00 to 9.10; 

 while the tarsus averages lmt about 2.00 in G. galeala, in the present species 

 the same measurement is 3.00 to 3.75. 



The collection embraces seven specimens, among which there is consider- 

 able variation, both in size and color; but the smallest specimens greatly 

 exceed in size the largest specimens of G. galeala. Some specimens present 

 a decided olive-brown tint over the middle portion of the dorsal surface, 

 while in others it is scarcely perceptible. 



57. Bernicla melanoptera Eytox. " ' Uyato.' Not common. Diffi- 

 cult to approach, and very tenacious of life." Two specimens ( £) ; Moho. 



58. Querquedula cyanoptera (Vikill.). " ' Pato Colorado.' Rather 

 rare." Four specimens (iwo J, two 9); Achecachc. 



59. Querquedula flavirostris (Yieii.l.). '• Common about all parts 

 of the lake. Young obtained in February." Seven specimens; Conima, 

 Vilcruechico, and Guicha. 



60. Querquedula puna (Tsch.). " Rather common. Young ones met 

 with in January." Four specimens (one young) ; Moho. 



61. Dafila spinicauda (Vieill.). " One of several birds called by the 

 Spaniards ' Pato de las Cordillieras.' Rather rare, two or three pairs being 

 all we saw in two months." One specimen (<£) ; Carapata. 



62. Erismatura ferruginea Eytox. " ' Pana.' Very common. Its 

 food consists of seeds of plants, mollusks, worms, etc. The young were less 

 than half grown at the first of February. They dive very quickly, and are 

 able to remain under water for a considerable length of time. Never try to 

 escape by Hying. Though exceedingly fat, they are quite tolerable for the 

 table." Fifteen specimens, including <£, 9> an( l young, ani * a ^ so several 

 skeletons ; Moho, Achecache, and Vilquechico. 



63. Merganetta armata Goui.d. " Rare." One specimen ; Moho. 



64. Phalacrocarax brasilianus (Gm.). '• ' Miji.' Abundant. They 

 sit much of the time on the rocks at particular localities, where the rocks 

 have become whitened with their excrement, whence they fly at quite regu- 

 lar intervals to their feeding-grounds." Four specimens ; Carapata. 



