596 
Mr. Charles Chubb on the 
generally a few scales from the tarsi of birds or skins of 
snakes. All the nests that I have met with have been in holes 
of fencing-posts or in trees; in fact the nest would fall to 
pieces in any other situation, owing to the loose manner in 
which it is built.— W. F .] 
157. Empidonomus varius. 
Suiriri chorreado debaoco Azara, Apunt. ii. p. 125. 
no. clxxxvii. (1805). 
Muscicapa varia Vieill. N. Diet. d^Hist. Nat. xxi. p. 459 
(1818: Paraguay). 
Empidonomus varius Berlepsch, J. f. O. 1887, p. 118 (Para¬ 
guay) ; Sclater, Cat. B. Brit. Mus. xiv. p. 265 ; Ihering, 
Bevista Mus. Paulista, vi. p. 326 (Paraguay) ; Hellmayr, 
Abhandl. Akad. Wiss. Miinclien, xxii. p. 654 (1906). 
a. $ ad. Sapucay, March 12, 1904. 
Bill black above, reddish brown below; feet black ; iris 
brown. 
158. Tyrannus melancholicus. 
Suiriri-guazu Azara, Apunt. iii. p. 152. no. cxcviii. 
(1805). 
Tyrannus melancholicus Vieill. N. Diet. d’Hist. Nat. 
xxxv. p. 48 (1819 : Paraguay) ; Berlepsch, J. f. O. 1887, 
pp. 13, 118 (Lambare) ; Sclater, Cat. B. Brit. Mus. xiv. 
p. 273; Ihering, Bevista Mus. Paulista, vi. p. 326 
(Paraguay); Hellmayr, Abhandl. Akad. Wiss. Miinclien, 
xxii. p. 647. 
a. $ ad. Sapucay, November 8, 1902. 
c, d. $ ad. et imm, Sapucay, March 1903-04. 
e. $ imm. Sapucay, April 5, 1904. 
[This species is common throughout Paraguay. It is 
generally to be met with along the watercourses in the open 
camp lands. The nest, as a general rule, is built in some of 
the low trees bordering these streams and in a very exposed 
position; the result of this is that parasitic birds find the 
nest a very convenient receptacle, and take full advantage 
of it, this species and Milvulus tyrannus being the most 
common victims.— W. jP.] 
