BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 27 



tina (from University of Kansas Museum, collected in 1903), in hav- 

 ing 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 some- 

 what 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. 



