338 Mr. C. H. B. Grant on Birds collected in Argeyitina, 



199. AUDETTA INVOLUCIUS. 



Ardetta involucris Arg. Orn. ii. p. 101 ; Sliarpe, Cat. B. 

 xxvi. p. 235 ; Gates, Cat. Birds' Eggs Brit. Mus. ii. p. 132. 



a. $ ad, LosYnglases, Ajo. Dec. 8, 1908. 



h. $ young. „ „ Jan. 11, 1909. 



Irides pale yellow ; bill yellow-ochre, culmen lioru- 

 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-bufty 

 edgings ; the " chestnut "" 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 sliaft, 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 Runnacles' 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 cafiadoi). 



200. TiGRISOMA MARMOKATUM. 



Tigrisoma marmoratum Arg. Grn. ii. p. 101; 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 the 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 scpia-brown. 



