88 Mr. C. H. B. Grant on Birds collected in Argentina , 
b. c, d. <£ ? ad. Los Ynglases, Ajo. June 1-8, 1909. 
e, /. $ ad. Riacho Ancho, N. Argentine. July 31,1909. 
g. $ ? ad. Arjerichi, Paraguay. Aug. 9, 1909. 
h. $ ad. Villa Oliva, „ Aug. 11, 1909. 
i. $ ad. Santa Rosa, „ Aug. 14, 1909. 
Irides hazel; bill and upper mandible black, lower pale 
yellow-brown; legs and toes brown. 
This is quite the rarest woodland bird in the Ajo district, 
where it is apparently only a winter visitor, arriving in the 
autumn and leaving again in the spring. 
I shot one on September 12th, soon after my arrival 
there in 1908, and more were observed afterwards till March 
or April of 1909. Miss Runnacles noted them in every 
month throughout that winter. 
This is a dainty and lively little bird, having much the 
habits and actions of a Zosterops , while the note is loud and 
shrill and not unlike the alarm-note of Troglodytes hornensis. 
It was very plentiful in the woods of the Northern 
Argentine and Paraguay. 
12. Geothlypis velata. 
Geothlypis velata Sharpe, Cat. B. x. p. 363, pi. ix. fig. 5 ; 
Arg. Orn. i. p. 20. 
Geothlypis cucullata Richmond, Auk, xvii. p. 179 (1900). 
a, b. $ ad. Puerto Pinasco, Paraguay. Sept. 17, 1909. 
c. $ ad. Curuzu Chica, „ Oct. 29, 1909. 
d. d a d. Bella Vista, N. Argentine. Nov. 12,1909. 
<$ . Irides hazel; bill black, lower mandible fleshy; legs 
and toes pale brown. 
? . Similar to the male, except that the upper mandible 
is dark brown. 
13. Basileuterus auricapillus. 
Basileuterus auricapillus Sharpe, Cat. B. x. p. 393 ; Arg. 
Orn. i. p. 21. 
a. $ ad. Riacho Ancho, N. Argentine. July 31, 1909 
Irides hazel ; bill brown ; legs and toes amber-yellow.. 
