116 Mr. C. H. B. Grant on Birds collected in Argentina , 
e. $ ad. Puerto Maria, Paraguay. Oct. 24, 1909. 
/. $ ad. Near Villa Franca, „ Nov. 6, 1909. 
<$. Irides yellow ; bill, legs, and toes brown. 
? . Irides pale yellow ; bill, legs, and toes born-brown. 
The females taken on the 24th of October and 6th of 
November were sitting. 
Only observed in the undergrowth and very tame. The 
call is in several syllables and loud and clear. 
83. Hapalocercus flaviventris. 
Hapalocercus flaviventris Scl. Cat. B. xiv. p. 94 ; Arg. Orn. 
i. p. 137. 
a. $ ad. Los Ynglases, Ajo. Oct. 27, 1908. 
b. <$ ad. ,, „ Nov. 4, 1908. 
c. ? young. „ „ Feb. 9, 1910. 
Ad. Irides hazel; bill, legs, and toes dark brown. 
The young bird differs from the adult in being :— 
Above more buffy brown than 4 mouse-brown, 5 edgings 
of the wing-feathers and coverts buffy brown ; below bright 
buff ; throat buffy slate, centre of breast and belly and 
under tail-coverts pale creamy yellow. 5 ’ 
A fairly common bird throughout the summer in the Ajo 
district, frequenting rough situations, including the drier 
parts of the canadon. It is retiring in habits, creeping about 
the tall reeds, thistles, or grass, after the manner of a 
Sedge-W arbler. 
I have only once come across the nest; this was a deep 
cup-shaped structure composed of water-weeds glued to¬ 
gether and attached to the stems of some stout reeds, and 
except for its larger size was similar to the nest of Cyanotis 
rubrigaster. 
84. Serpophaga subcristata. 
Serpophaga subcristata Scl. Cat. B. xiv. p. 102 ; Arg. Orn. 
i. p. 140. 
0, b. (p ? . Los Ynglases, Ajo. Sept. 10-18, 1908. 
c, d. A young. „ „ Jan. 2, Mar. 10, 1909. 
e. ? ad. „ ,, May 4, 1909. 
