426 BULLETIN 133, UNITED STATP.S NATIONAL MUSEUM 



clumps of cola de zorro^ a plumed grass, standing amid thickets of 

 thistles. The birds were usually in pairs, though in the Chaco, 

 where they were common, five or six frequently congregated. They 

 fed in little open places on the ground where they walked al^out 

 sedately, or when in a hurry progressed with long hops. Their 

 flight was rapidly tilting. When excited they perched in low bushes 

 or clumps or grass, appearing big and bluff as they are strong and 

 robust of body. During winter, males sang an absurd little whis- 

 pered song that was barely audible at 50 meters, but with the opening 

 of the nesting season they became more noisy and sang persistently 

 a curious accented song. The strangely phrased notes may be 

 represented as oo to fa la tsuf la tsee. Their call is a faint tsip. 



Occasionally one came hopping about camp in search of bread 

 crumbs, and they often pecked avidly at bits of cooked meat or at 

 freshly skinned bird bodies. Their tameness under such circum- 

 stances has given them the name of toldero in eastern Buenos Aires. 

 In the Chaco they were known as Juan che vido, while elsewhere 

 they were called cotorron or cotorrito. 



Young in streaked juvenal i^lumage were taken at Guamini, 

 Buenos Aires, March 3. The plumage of adults is subject to much 

 wear and abrasion, perhaps from the saw-edged grasses amid which 

 they live, so that the green shade of the upper surface changes to 

 gray; in some the prominent dark streaks of the back entirely dis- 

 appear. 



An adult male, taken July 9, had the upper part of the maxilla 

 blackish slate; sides of maxilla and mandible zinc orange; iris 

 dark brown; tarsus sayal brown; toes and claws hair brown; un- 

 derside of toes yellowish. A juvenile male, taken March 3, had 

 the maxilla (except at sides adjacent to the feathers) and a stripe 

 along sides of mandible dull black; base of maxilla and lower mar- 

 gin of mandibular rami chamois, shading at margin to antimony 

 yellow; anterior half of cutting edge of mandible and region over 

 gonys slightly paler than avellaneous; iris natal brown; tarsus be- 

 tween benzo brown and fuscous; nails blackish. 



EMBERNAGRA OLIVASCENS OLIVASCENS d'Orbigny 



Enibernagra oUvascens d'ORBiGNY, Voy. Amer. M6rid., Ois., 1835-1844, p. 

 285. (Enquisivi, Province of Sicasica, Palca, Province of Ayupapa, 

 and valley of Cochabamba.) 



The present species is distinguished from E. jjlatensis by the plain, 

 unstreaked back. The typical subspecies is represented by a bird 

 molting from juvenal to first fall plumage secured at Tapia, Tucu- 

 man, on April 6, 1921. This is distinctly greener above than skins 

 of E. 0. gossei of similar age. An adult male taken August 7, 1922, 



