Paraguay, Bolivia, and Southern Brazil. 103 



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. ($ 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, liorn-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. ; /. ^ juv. Los Ynglases, Ajo. Dec. 1908. 

 g-k. c? ; /. ? ad. „ „ Jan. 1909. 



m. ^ ad. Los Ynglases, Ajo. April 28, 1909. 

 n. ? juv. „ „ Dec. 23, 1909. 



Bill, legs, and toes dark olive-green. 

 0, (J ad. Los Ynglases, Ajo. Jan. 7, 1910. 

 p. (J 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. 



