136 On Birds collected in Argentina, Paraguay, ^c. 



c. S ad. 10 miles above Villa Pilar, Paraguay. Aug. 7, 

 1909. 



d. ? ad. 10 miles below Boca de Homiguera^ Brazil. 

 Oct. 12, 1909. 



e. (J ad. Curuzu Chica, Paraguay. Oct. 29, 1909. 

 /. S ad. Near Goya, N, Argentine. Nov. 13, 1909. 



S . Irides red ; bill slate-coloured, black at tip ; legs and 

 toes slate-coloured. 



? . Irides deep rich orange ; bill, legs, and toes slate- 

 coloured. 



Commonly observed, frequenting the low scrub anc' 

 undergrowth in the forests and the edges of the swamps. 



132. Thamnophilus c^rulescens. 



Thainnophilus carulescens Scl. Cat. B. xv. p. 200 ; Arg. 

 Orn. i. p. 204. 



a. (^ ad. Arjerichi, Paraguay. Aug. 9, 1909. 



Irides hazel ; bill, upper mandible black, lower slaty ; 

 legs and toes slaty. 



Call a loud and clear " qua qua." 



133. Thamnophilus radiatus. 



Thamnophilus radiatus Scl. Cat. B. xv. p. 210; Chubb, 

 Ibis, 1910, p. 520 (Paraguay). 



a, b. S ^ ad. Boca de Homiguera, Brazil. Oct. 9, 1909. 



c, S ad. Cabo Emma, Paraguay. Oct. 20, 1909. 



S ? . Irides yellow ; bill, legs, and toes blue-slaty, 

 culmen black. 



134. FoRMIClVORA rufa. 



Formicivora rufatra Scl. Cat. B, xv. p. 250. 

 Formicivora rufa Allen, Bull. Amer. Mus. ii. p. 253 (1889); 

 Sharpe, Hand-1. B. iii. p. 25. 



a. ? ad. Albuquerque, Brazil. Oct. 1, 1909. 

 Irides hazel ; bill, legs, and toes blue-slaty. 



135. Cercomacra melanaria. 

 Cercomacra melanaria Scl. Cat. B. xv. p. 268. 



a,h. $ ? imm. &ad. Albuquerque, Brazil. Oct. 1,1909. 



