U. S. NATIONAL MUSEUM 



BULLETIN 133 PL. 2 



Border of Low Woodland in Formosan Chaco 



Riacho Pilaga, Formosa, August 8, 1920 



Small Lagoon in Chaco, Partly Covered with Floating Plant 

 Known as Llantel de Caballo (Pistia occidentalis) 



La Sabana, Chaco, July 5, 1920 



