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BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 27
tina (from University of Kansas Museum, collected in 1903), in having
the wings more heavily marked with dark bands and the neck
grayer."
PTEROCNEJMIA PENNATA (d'Orbigny)
Rhea pennaia d'OBBicNY, Voy. Amer. Merid., Itin., vol. 2, 1834, p. 67.
(Bahia San Bias, southern Buenos Aires.)
On December 6, 1920, at Zapala, in western Neuquen, I examined
an adult female of Darwin's rhea secured by a police officer, who had
killed the bird about 50 kilometers southwest of town by a fortunate
shot with a revolver. As the rhea had been skinned roughly to pre-
pare it for the table, I was able only to note the curious arrangement of
the feathering on the front of the tarsus and to secure the skull. On
December 10 I saw a living young bird, recently hatched, of the same
species that had been captured between a j)oint below San Martin de
Los Andes and Zapala. The call of this chick was lower and somewhat
harsher than that of Rhea americana, but had a similar mourn-
ful, whistled inflection.
The skull secured has the dorsal elongation of the lachrymal bone,
short and triangular, extending back only to a point well anterior to
the rearward extension of the nasals, with the orbital margin of the
postorbital process smooth. In Rkea ainericana the lachrymal is
produced as an elongate spine that ends at the level of the posterior
end of the nasals, while there is a distinct notch where the anterior
margin of the postorbital process joins the margin of the orbit. I
am not able to distinguish the difference in the form of the temporal
fossa in the two species described by Pycraft.'^
A second skull taken from the mummied body of a bird only half
grown found on a butte south of Zapala December 9, exhibits the
same distinguishing characters in the lachrymal as the adult.
Order TINAMIFORMES
Family TINAMIDAE
CALOPEZUS ELEGANS ELEGANS (la. Geoff. Saint-Hilaire)
Eudromia elegans "D'Orb. et Is. Geoff.," Is. Geoff. Saint-Hilaire, Mag.
Zool., 1S32, cl. 2, pi. 1. (Mouth of Rio Negro.*)
On December 15, 1920, while working through the rolling pampa
south of the shore of Lago Epiquen, near Carhue, Buenos Aires,
" For a description of the iiabita, economic value, hunting, and domestication of the
rhea see La Cultura Argentina, Muniz, F. J., Escritos Cientiflcos, 1916, pp. 83-218, an
acccount reprinted from old numbers of La Gaceta Mercantil.
'' Ou the Morphology and Phylogeny of the Palaeognathae, Trans. Zool. Soc. London,
vol. 15, December, 1900, p. 270.
» Designated by Peters, Bull. Mus. Comp. ZoOI., vol. 65, May, 1923, p. 287.