335 
Paraguay , Bolivia , and Southern Brazil. 
found them feasting on the carcases of dead stock in 
company with Chimangos and Gulls. 
The nest is a large and often inaccessible structure of 
sticks, placed in a big tala or other tree, and I have heard 
of the bird breeding occasionally on the ground. 
I did not obtain the eggs ; but there is a set of three in 
Miss Binnacles’ collection, taken at Ajo on Sept. 17, 1909 ; 
they are very dark with little of the ground-colour shewing, 
and measure : axis 2*42 to 2 5 in., diam. 1*79. 
Fam. Cathartics. 
192. Cathartes aura. 
Cathartes aura Arg. Orn. ii. p. 89. 
a. $ ad. Tayra, Paraguay. Aug. 6, 1909. 
Irides crimson; bare skin of head and neck bright 
yellow, rich chrome round eye, and bluish on crown and 
throat ; bill deep flesh-coloured; legs and toes yellow, 
powdered with white. 
Commonly observed in most localities on the river 
expedition, usually singly. It has a graceful easy flight, and 
hawks backwards and forwards after the manner of a Kite; 
it has a peculiar mewing call. 
Fam. Phalacrocoracids. 
193. Phalacrocorax brasiliensis. 
Phalacrocorax brasilianus Arg. Orn. ii. p. 91. 
Phalacrocorax vigua Grant, Cat. B. xxvi. p. 378. 
a. $ ad. Tebicuari, Paraguay. Aug. 8, 1909. 
b. $ imm. Monte Alto, ,, Aug. 25, 1909. 
The adult bird is moulting, and has a few scattered white 
feathers on the head and neck. 
Irides brown, orbits and lores sooty ; bill horn-coloured, 
yellowish at base of lower mandible ; legs and toes black. 
The immature bird is also moulting, except for the wings, 
and is everywhere assuming the dark plumage, but the 
new feathers of the tail are still tipped with u brownish 
white.” 
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