Paraguay, Bolivia , and Southern Brazil. 131 
ashy edges to the feathers, and the February birds are 
moulting. 
The young in December were taken from the nest. 
The throat-patch varies from pale sulphur-yellow to deep 
cinnamon; in most specimens each feather has a black 
centre at the tip, in others this is entirely wanting. 
The young bird taken in March is fully fledged, and differs 
from the adults as follows :— 
a Margins of back and wing-feathers much broader than 
in the adult and more buffy; gular patch faint ; throat and 
neck finely speckled; breast and flanks with broad black 
centres to each feather.” 
A common species which frequents the open grass country, 
where it is skulking in habits and reluctantly takes to 
flight. 
The nest is difficult to find, owing to the bird sneaking off 
and hiding in the grass ; it is placed on the ground in thick 
grass and is a dome-shaped structure of dead grass, lined 
with feathers. 
In both nests that I secured there were eggs of Molothrus 
bonariensis . 
119. SlPTORNIS MALUROIDES. 
Siptornis maluroides Scl. Cat. B. xv. p. 72; Arg. Orn. i. 
p. 188. 
a. ¥ ad. Cape San Antonio. Dec. 17, 1908. 
b. $ young. Luiconia, Ajo. Jan. 8, 1909. 
c. ? young. Los Ynglases, Ajo. Jan, 6, 1909. 
d . e. S & yg. „ „ Feb. 7, 1909. 
f> g. S ad. & yg. „ „ Feb. 10, 1910. 
Irides very pale yellow; bill, upper mandible dark, lower 
pale horn-coloured; legs and toes pale horn-coloured. 
The adult of February 1909 is moulting. 
The young birds differ from the adults as follows :— 
P Forehead and middle of crown fulvous brown, slightly 
striated with blackish; beneath pale buff, striations on flanks 
less distinct than in the adult and the black specklings of 
the throat and chest more numerous.” 
k 2 
