338 Mr. C. H. B. Grant on Birds collected in Argentina, 
199. Ardetta involucris. 
Ardetta involucris Arg. Orn. ii. p. 101 ; Sharpe, Cat. B. 
xxvi. p. 235 ; Oates, Cat. Birds’ Eggs Brit. Mus. ii. p. 132. 
a. $ ad. Los Ynglases, Ajo. Dec. 8, 1908. 
b. $ young. „ „ Jan. 11, 1909. 
Irides pale yellow; bill yellow-ochre, culmen horn- 
coloured ; orbits greenish yellow ; legs and toes grass- 
green ; backs of tarsi and soles of feet yellow. 
The young bird differs from the adult in having the 
sides of the head and neck washed with deeper brown ; 
the striping of the back narrower with more golden-buffy 
edgings; the “ chestnut 99 of the wing-coverts and bastard 
wing more vandyke-brown; the primaries and secondaries 
distinctly tipped with dusky, the innermost with the chest¬ 
nut restricted along the shaft, the rest of the feathers being 
dusky, with the outer web edged with golden buff. 
This species is common in the reed-beds in the Ajo dis¬ 
trict, but very difficult to shoot, as it seldom takes to flight. 
When alarmed it runs and climbs among the reeds with 
extraordinary agility, and its colour lends itself so well to 
the dry and brown reeds that it is soon lost to sight. 
It breeds in the Ajo district, and there are two eggs in 
Miss Bunnacles’ collection from a clutch of three. These 
are of a clear pea-green, and measure: axis 1*36 and 1*39 in., 
diam. 2*01 and 2‘0. 
The nest was a small platform of dry sticks in a canadon. 
200. Tigrisoma marmoratum. 
Tigrisoma marmoratum Arg. Orn. ii. p. 104; Sharpe, 
Cat. B. xxvi. p. 195. 
a. $ ad. Alto Paraguay, Bolivia. Sept. 28, 1909. 
Irides lemon-yellow; bill, upper mandible dark purple- 
brown extending to tjie lores in two streaks, one to the 
eye and the other below the eye, the rest of the lores and 
orbits being lemon-yellow, as likewise are the bare cheeks; 
lower mandible dark purple-brown, fleshy along lower edge; 
bare skin of chin and sides of throat pale greenish lemon- 
yellow; legs and toes dark sepia-brown. 
