130 Mr. C. H. B. Grant on Birds collected in Argentina, 
Jan. 4, 1909. 
Feb. 7, 1909. 
Mar. 13, 1909. 
Feb. 3, 14, 1910. 
117. SlPTORNIS SULPHURIFERA. 
Siptornis sulphurifera Scl. Cat. B. xv. p. 69. 
Sgnallaxis sulphurifera Arg. Orn. i. p. 185. 
a. ? ad. Los Ynglases, Ajo. Dec. 27, 1908. 
b, c. c£? ad. & juv. „ „ 
d. ? juv. 
e. ¥ juv. „ „ 
f. g■ 8 ¥ young. „ „ 
Ad. Irides pale brown ; bill horn-coloured, base of lower 
mandible flesh-coloured; legs and toes purplish brown. 
Young. Irides very pale brown; bill horn-coloured, base 
of lower mandible and gape yellow; legs and toes darkish 
purplish brown. 
Both the adults are much worn, the male having been 
taken with the nest and eggs. 
The young birds differ from the adults as follows :— 
“ Above fawn-brown; forehead and superciliaries dark buff; 
ear-coverts, cheeks, and whole under side bright buff, with no 
sulphur-yellow spot in the middle of the throat.” 
A fairly common species, which frequents the canadons, 
where it also breeds, the nest being a dome-shaped structure 
of dry grass with the entrance-hole at the side, suspended 
in the thick grass or rushes; three eggs apparently make 
the complete clutch. 
118. Siptornis hudsoni. 
Siptornis hudsoni Scl. Cat. B. xv. p. 70; Arg. Orn. i. 
186. 
a , b, c. $ $ ad. Los Ynglases, Ajo. 
d, e. S young. „ „ 
Cape San Antonio. 
Los Ynglases, Ajo. 
f, g■ 8 ad. 
h . $ ad. 
i, j. <? ? ad. 
le. £ young. 
Nov. 10-30, 1908. 
Dec. 1, 1908. 
Dec. 17-21, 1908. 
Jan. 21, 1909. 
Feb. 4, 1909. 
Mar. 21, 1909. 
Young. Irides hazel; bill horn-coloured, yellow at gape ; 
legs and toes ashy flesh-coloured. 
The December adults are worn and have almost lost the 
