103 
Paraguay, Bolivia, and Southern Brazil. 
bird, though it will often perch on the tops of plants and 
wire fences. 
The nest is built on the ground in lowish-lying situations 
and in the denser vegetation, such as beds of thistles. It is 
fairly deep and cup-shaped and is a rather frail structure of 
grass and hair. 
53. Cassicus albirostris. 
Cassicus albirostris Scl. Cat. B. xi. p. 323. 
a. $ ad. Arjerichi, Paraguay. Aug. 9, 1909. 
Iris white; bill slate-coloured ; legs and toes black. 
b. ? ad. Villa Oliva, Paraguay. Aug. 4, 1909. 
c. $ ad. Villa Franca, „ Nov. 6, 1909. 
54. Amblycercus solitarius. 
Amblycercus solitarius Scl. Cat. B. xi. p. 326 ; Arg, Orn. 
i. p. 72. 
a. S ad. Puerto Pinasco, Alto Paraguay. Sept. 7, 1909. 
Iris reddish brown; bill pale yellow-pearl; legs and toes 
sooty brown. 
b. $ ad. Puerto Pinasco, Alto Paraguay. Sept. 7, 1909. 
Iris brown; bill yellow-pearl, horn-coloured at base ; legs 
and toes sooty brown. 
c. Ad. Villa Pilar, Paraguay. Nov. 7, 1909. 
55. Molothrus bonariensis. 
Molothrus bonariensis Scl. Cat. B. xi. p. 335; Arg. Orn. i. 
p. 72. 
a, b. $ ^ ad. Los Ynglases, Ajo. Sept. 17, 1908. 
Iris hazel; bill, legs, and toes black. 
c, d . % ad. Los Ynglases, Ajo. Oct. 29, 1908. 
e. £ ad.; /. S juv. Los Ynglases, Ajo. Dec. 1908. 
g-k. S ; l- ? ad. „ „ Jan. 1909. 
m. S ad. Los Ynglases, Ajo. April 28, 1909. 
n. $ juv. „ „ Dec. 23, 1909. 
Bill, legs, and toes dark olive-green. 
o. S ad. Los Ynglases, Ajo. Jan. 7, 1910. 
p. S ad. Cabo Emma, Alto Paraguay. Oct. 20, 1909. 
q. S juv. Villa Pilar, Paraguay. Nov. 7, 1909. 
r. ? ad. Bella Vista, N. Argentine. Nov. 12, 1909. 
