of the Lower Pilcumayo. 141 



104. BoLRORHYNCHUS MONACHUS, [Op. cU . \i. p. 43.) 



(No. 149, S; 307,150, ? .) 

 Abundant. 



105. Chrysotis estiva. {Op. cit. ii. p. 47.) 



(Nos. 144, 197, (?; 198, ?.) FortinPage. September 

 25tli, 1890. 



Abundant. During spring, especially, their loud cries 

 resound in all directions. Their cry resembles the syllable 

 ^' caa " uttered in a great variety of inflections, and often 

 amusingly expressive of fright, indignation, and remonstrance, 

 according to circumstance. They nest in hollow palm- 

 trees ; and the young are easily tamed and taught to speak. 



106. PlONUS MAXIMILIANI. [Op. cit. ii. p. 47.) 



(No. 56, S-) Near Fortin Nueve. April 13th, 1890. 

 Occasionally in considerable numbers, but as a rule un- 

 common. Goes in small parties. 



107. Bubo vtrginianus. {Op. cit. ii. p. 50.) 



(No. 369, $ .) Near Fortin Nueve. April 2nd, 1890. 

 Toba, " Chigiriki ik.^' 



The commonest Owl on the Pilcomayo. Abundant and 

 conspicuous. Its loud " boo-hoo-hoo ''' is one of the charac- 

 teristic night sounds of the Chaco. One of the favourite 

 articles of food of this species consists of large grasshoppers. 



-' 108. Scops brasilianus. {Op. cit. ii. p. 51.) 



Obtained on the Bio Paraguay, and identified on the 

 Pilcomayo by its cry, which is very characteristic. 



— 109. Glaucidium ferox (Vieill.) : Sharpe, Cat. B. ii. 

 p. 200. 



(No. 303.) Fortin Page. October 24th, 1890. Guarani, 

 '' Cabure.^' 



[Met with in Paraguay by Azara (No. 49), but new to the 

 Argentine list. — P. L. S.] 



— 110. TiNNUNCULUs cinnamoaiinus. {Op. cit. ii. p. 69.) 

 Frequent, and at times abundant. 



