U. S. NATIONAL MUSEUM 



BULLETIN 133 PL. I! 



Valley of Rio Blanco, with Sierra del Plata in the Background 



Above Potra-illos, Mendoza, March 18, 1921 



A Muddy Channel, or Cienaga, Haunt of Painted Snipe (Nycti- 



CRYPHES SEMI-COLLARIS) AND JACKSNIPE (CAPELLA PARAGUAIAE) 



Near Tunuyan, Mendoza, March 28, 1921 



