A 7 . TV. Argentina and the Bolivian Chaco. 453 



•f-3. /Egialitis semipalmata (Bp.). 



San Luis, February Gth, 1902. Iris brown. 



-f-4. Heteropygia maculata (Vieill.). 

 San Luis, February 8th, 1902. 

 Zapatero, March 8th, 1902. 



-f-5. QUERQUEDULA VERSICOLOR (Vieill.). 



San Luis, March 4th, 1902. 



6. Spatula platalea (Vieill.) . 



Iris reddish yellow (stated to be white in Cat. Birds 

 Brit. Mus. vol. xxvii. p. 317). 



This specimen is an adult shot at San Luis in April, 

 1902. A young bird shot at Abra Pampa on the "puna," 

 is stated to have had brown eyes. 



Pairs are usually found on the rivulets. 



-f-7. Phalacrocorax vigua (Vieill.). 



Adult birds in full plumage were shot at San Luis, 

 March 4th, 1902. An adult bird in transitory plumage was 

 shot on January 17th. 



8. Falco cassini Sharpe. 

 Tolomosa, February 8th, 1902. 



The bluish-ashy and black bars on the tail are distinct to 

 the tip ; otherwise the example agrees with the description 

 in Cat. Birds Brit. Mus. vol. i. Wing 345 mm. Iris brown. 



9. Tinnunculus cinnamomimus (Swains.). 



Adult males from San Luis, January 26th, 1902. Three 

 females from the same place, January 1902. Iris brown. 



10. Polyborus tharus (Molina). 



This Carrion-Hawk was very common at San Luis, and 

 appeared as soon as anything that could pass for eatable was 

 thrown out. Iris yellow (brown, according to Cat. Birds 

 Brit, Mus. vol. i.). 



11. BoLBORHYNCHUS AYMARA (d'Ol'b.). 



Occurred at San Luis in large Hocks, screaming loudly 

 when flying round. Jris brown. 



