of the Lower PUcomaijo. 1-13 



" eh " much prolonged. Also occasionally seen soaring. 

 Its most usual food is the ordinary river-crab. 



[Recorded from Paraguay by Azara (No. 13) and by 

 V. Berlepsch (J. f. O. 1887^ p. 123), but an addition to tlie 

 Argentine list. — P. L. S.] 



117. ASTURINA PUCHERANI. [Op. cit. ii. p. 58.) 



A skin of this species brought home has been compared 

 with specimens in the British Museum. 



118. Geranoaetus melanoleucus. {Op. cit. ii. p. 64.) 

 Commonly seen soaring in circles at an immense height, 



especially when attracted by camp-fires. It is very wary and 

 difficult to approach. 



) 119 Heterospizias meridionalis. [Op. cit. ii. p. 63.) 

 (No. 175, ^ .) Frequently met with. 



120. Accipiter chilensis, Phil, et Landb. : Scl. et Salv. 

 Ex. Orn. p. 73^ t. xxxvii. ; Oust. Miss. sc. d. Cap Horn, 

 Ois. p. 21. 



(No. 131, ? .) This specimen has been identified by 

 Dr. Bowdler Sharpe at the British Museum. It is a nearly 

 adult female. 



[This species was hitherto known only from Chili and the 

 Magellan Straits, and its occurrence on the Pilcomayo is a 

 fact of much interest. — P. L. S.] 



—121. Geranospizias cerulescens. [Op. cit. ii. p. 67.) 



Occasional. Flies slowly along at a slight elevation, or 

 sits perched on a tree uttering a prolonged shrill whistle. 

 Feeds chiefly on bats and other small mammals. 



122. PoLYBORus THARUS. {Op. cit. ii. p. 81.) 

 Very abundant. 



( 123. Cathartes aura. {Op. cit. ii. p. 89.) 

 Very abundant. 



/ 124. Cathartes atratus. (O/?. cit. ii. p. 89.) 

 Very abundant ; rather more numerous than C. aura. 



