Ill 
Paraguay , Bolivia , awe? Southern Brazil. 
74. TjENIOPTERA IRUPERO. 
Tcenioptera irupero Scl. Cat. B. xiv. p. 13; Arg. Orn. i. 
p. 118. 
a. $ ad. Tayru, Paraguay. Aug. 5, 1909. 
b. $ ad. Villa Franca, Paraguay. Aug. 5, 1909. 
c. $ ad. Colonia Mihanovitch, N. Argentine. Aug. 12, 
1909. 
Irides brown; bill, legs, and toes black. 
Many of this "Widow-bird" were seen on the river 
expedition, always alone and perched on the tops of 
solitary bushes, whence they fly off to take passing insects. 
75. Fluvicola albiventris. 
Fluvicola albiventris Scl. Cat. B. xiv. p. 36 ; Arg. Orn. i. 
p. 121. 
a. S ad. Colonia Bisso, Paraguay. Sept. 8, 1909. 
Irides hazel; bill, legs, and toes black. 
Quite a number of these birds were seen frequenting the 
water-weeds and vegetation on the river-banks. When on 
the ground at first sight they look like Wagtails. 
76. Arundinicola leucocephala. 
Arundinicola leucocephala Scl. Cat. B. xiv. p. 37 ; Arg. 
Orn. i. p. 122. 
a , b } c. $ $ ad. & young. Monte Alto, Paraguay. 
Aug. 25,1909. 
d. <$ young. Alto Paraguay, Bolivia. Oct. 17, 1909. 
Iris hazel; bill, legs, and toes black, base of lower 
mandible pale yellow. 
The adult male and female are rather worn. 
The August young male is similar to the adult female, but 
rather paler, and has some long white feathers on the head. 
The October young bird is more advanced, having almost 
assumed the white head, and black feathers are rapidly 
replacing the cinereous dress of the back and wings and the 
white of the under parts. 
This bird was first observed at Monte Alto and occasionally 
afterwards to the northward, but was by no means common. 
It frequented the sandy shores of the river and lagoons, 
and perched on any outstanding piece of driftwood. 
