BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 427 



at Tucuman, by D. S. Bullock, also is distinctly greener on the back 

 than a small series of gossei. 



EMBERNAGRA OLIVASCENS GOSSEI Chubb 



Emiemagra gossei Chubb, Ibis, 1918, p. 3, pi. 1, fig. 2. (Lujan, Mendoza.) 



The southern subspecies of oUvascens, described by Chubb as 

 gossei, is characterized by the gray dorsal surface. At Tunuyan, 

 Mendoza, it was fairly common from March 22 to 29 near wet, 

 swampy localities. Specimens taken include an adult female and 

 two young in juvenal plumage. Adults at this season were in worn 

 dress and were molting, while juveniles were beginning to assume 

 first fall plumage. In the juvenal stage this species is duller in 

 color than E. jilatensls and has the dark streaks narrower and less 

 sharply defined, particularly on the upper surface. 



The birds at this season frequently found congenial haunts in 

 cornfields bordering the saw-grass tracts of the extensive cieuagas 

 that formed their usual homes. 



DONACOSPIZA ALBIFRONS (Vicillot) 



Sylvia alMfrons Vielllot, Nouv. Diet. Hist. Nat., vol. 11, 1817, p. 276. 

 (Paraguay.) 



Strange little long-tailed finches of this species were first seen in 

 dense grass bordering a marsh at Las Palmas, Chaco, July 28, 1920 

 (adult male secured). Later, on October 25 and November 15 they 

 were found breeding in growths of rushes near the mouth of the Rio 

 Ajo, below^ Lavalle, Buenos Aires, where three w^ere taken. They 

 perched on the rush stalks with long tails blowing in the wind, or 

 flew to secure coverts with rapid, tilting flight. Their call was a 

 low chip or zit. The song was a pleasant buzzing warble that may 

 be written as tsef tsef tsef wee tsu wee tsu wee tsu, barely audible 

 above the rustling of the wind in the grass. 



The species in general suggests a Poospiza of the nigro-rufa type 

 with a greatly elongated tail. 



MYOSPIZA HUMERALIS HUMERALIS (Hose) 



Tanagra humeraUs Bosc, Journ. Hist. Nat., vol. 2, 1792, p. 179, pi. 34, 

 fig. 4. (Cayenne.) 



As indicated by Chubb,^^ Tanagra hiimeralis of Bosc from Ca}^- 

 enne has priority over Fringilla nianimbe Lichtenstein,^*^ as birds 

 from Bahia and the Guianas appear identical. In recent years 

 several forms have been distinguished in this widely distributed 



«Bull. Brit. Orn. Club, vol. 31. Jan. 25, 1913, p. 39. 



'^^ Fringilla ilanimbe Lichtensteiii, Verz. Doubl. Zool. Mus. Berlin, 182."!, p. 25. 

 (Babia.) 



