Birds of Central Patagonia. 405 
appearance of the eggs of the Sandwich Tern^ though of 
course smaller; and out of many hundreds I did not see two 
alike. 
*Larus dominicanus. 
Resident. A few seen near Lake Colguape. I found about 
fifty pairs nesting on Tombo Point in December. They make 
a large structure of grass and seaweed; and most of the nests 
contained two or three eggs, 
*Larus maculipennis. 
Resident. A few birds observed up the Sengel and about 
the lake. 
Last year many pairs nested in the valley of the Chupat, 
They chose some low swampy land^ which had been flooded 
for the purpose of growing wheat in 1876^ and on which the 
following year a thick growth of rushes had sprung up. The 
nests were made of grass and weeds^ and placed in the water. 
I secured about a dozen eggs and one or two old birds, 
f ^CHMOPHORUS MAJOR. 
Resident. Observed constantly in a large brackish lake 
in the Chupat valley in September, and subsequently seen in 
lagoons in the valleys of the Sengel and Sengelen, and in Lake 
Colguape, 
.^■^PODICEPS CALIPAREUS. 
Resident, and commonly seen in lagoons in all the valleys. 
Iris between crimson and scarlet; beak dark horn-colour; 
legs pale slate. 
Tachybaptes dominictjs. 
Resident, and common in lagoons in the valleys of the Chu¬ 
pat, the Sengelen, and the Sengel, 
" ■^NoTHURA PERDicARIAf. 
Resident. This species was wrongly named Nothura ma~ 
t [Mr. Durnford has not sent specimens of this bird, which we have 
little doubt is the Perdix chico ” of Mr. Hudson’s paper on the birds of 
the Rio Negro, Patagonia (P. Z. S. 1872, p. 547). At that time Sclater 
determined this to be Nothura darwini, Gray, a species we now consider 
identical with N. horaquira (Spix) (Nomencl. p. 153 ).—Edd.] 
SER. IV.-VOL. II. 2 F 
