204 PODICIPEDID^E. 



thickest rushes of the swamp. The nest, built of wet water-weeds, is 

 raised just above the level of the water ; and I have twice seen the 

 sitting bird hastily draw some weeds over the eggs before leaving them, 

 on ray approach. The clutch consists of three; and these are of the 

 usual Grebe colour, generally much soiled and stained. They average 

 2^ ff x IJ-Q, the length sometimes presenting a variation of $, even in 

 eggs of the same nest." 



420. PODICEPS CALIPARJEUS, Less. 

 (BRIGHT-CHEEKED GREBE.) 



Podiceps caliparaeus, Darwin, ZooL Voy. 'Beagle,' iii. p. 136; ScL et Salv. 

 Nomencl p. 150 ; iid. Ex. Orn. p. 190 ; Durnford, Ibis, 1877, p. 45 (Chupat), 

 et 1878, p. 405 (Centr. Patagonia) ; White, P. Z. S. 1883, p. 43 (Cordova). 



Description. Above dark greyish ; front of head and neck behind pale cine- 

 reous ; back of head and upper part of neck black ; ear-coverts considerably 

 elongated, golden brown : beneath, throat grey, paler than front of head ; rest 

 of under surface shining white; primaries greyish brown, the innermost tipped 

 with white ; secondaries more or less pure white, or dusky on outer webs : 

 whole length 11'5 inches, wing 4*7. Female similar. 



Hab. Antarctic America, north to Cordova. 



Darwin obtained examples of this beautiful Grebe at Bahia Blanca, 

 where, he says, ef it lives in small flocks in the salt-water channels 

 extending between the great marshes at the head of the harbour." 

 Durnford procured specimens on both visits to Chupat, where he found 

 it common in the lagoons in all the valleys. It is also found, though 

 not so abundantly, in the northern provinces of the Argentine Republic. 

 White obtained a single example at Cosquin, near Cordova, in Sep- 

 tember 1882. 



421. PODICEPS EOLLANDI, Quoy et Gaim. 

 (ROLLAND'S GREBE.) 



Podiceps rollandi, ScL et Salv. Nomencl. p. 150 ; iid. Ex. Orn. p. 190 ; iid. 

 P. Z. S. 1868, p. 146 ; ScL P. Z. S. 1872, p. 549 (Rio Negro) ; Durnford, 

 Ibis, 1877, p. 45 (Chupat) ; Gibson, Ibis, 1880, p. 164 (Buenos Ayres) ; White, 

 P. Z. S. 1883, p. 43 (Cordova) j Narrows, Auk, 1884, p. 317 (Bahia Blanca). 



Desertion. (Summer plumage.) Above brownish black, with dark green 

 reflexions ; all the feathers below the neck narrowly margined with rufous ; ear- 

 coverts elongated, white at base with black tips, and more or less covering the 

 downy white feathers of the sides of the head ; outer half of primaries brownish 

 grey, darker at tip ; inner half and secondaries more or less pure white, some of 



