458 Dr. E. Lonnberg on Birds from 



V. Birds or Tatarenda and Fortin Crevaux, 

 in the Bolivian Chaco. 



The birds obtained by the Expedition at the fourth 

 Station (Tatarenda) and fifth (Fortin Crevaux) are enume- 

 rated together, as both these places are situated in the 

 Bolivian Chaco and arc not very far apart. Their natural 

 features have been described above. 



1. Rhea Americana Lath. 



This bird was often seen at Tatarenda in open places, but 

 as soon as danger threatened it ran in among the spiny 

 bushes, where it could not be; pursued. 



2. Oktalis canicollis (Wagl.). 



An adult specimen from Tatarenda, shot in April 1902. 

 Iris brown ("gialla," according to Salvadori). 



A young bird, probably of this species, was shot at the 

 same place at the end of May 1902. It is stated to have 

 had brownish-yellow irides. The tail-feathers are not yet 

 visible among the coverts, but the quills of the wings are 

 almost fully developed, and the wings measure 210 mm. in 

 length. The primaries arc, however, not quite full-grown and 

 reach only a few millimetres beyond the inner secondaries. 

 The colour of the young bird is a little more brown than 

 that of the adult. 



3. Penelope obscura Wagler "*. 



Mr. von Hofsten informs me that this bird is known 

 under the name lt Pavo del monte," which it shares with 

 other Cracidaz. It lives in small family-flocks at the edge 

 of the forest. When scared it tries to escape from danger 

 by running along the branches of the trees or jumping from 

 branch to branch rather than by flight. It docs not fly 

 well or easily. 



* [Dr. Lonnberg has sent us for examination a skin of this Penelope, 

 which agrees well with specimens of P. obscura in the British Museum 

 from the same district. lie calls our attention to the sharply excised 

 outer primaries — a character stated in the B. M. Catalogue (xxii. p. 473) 

 to he peculiar to PipUe, Aburria, and Chamcepetes, which, however, is 

 certainlv not the case — Edd. 



