observed in the Gran Chaco. 229 



Fam. XVITI. Cuculid^.. 



62. CoccYzus AMERiCANUs (Linn.). 



W. Common in open monte, Nov., Jan. 



63. DiPLOPTERUs N^vius (Linn.). 



Villa Concepcion. Cry very often heard in the Chaco 

 opposite the town. Oct. 



64. Crotophaga major Gm. 

 Villa Concepcion. 



65. Crotophaga ani Linn. 



Villa Concepcion, Oct. 1896. Very abundant. 

 W., Nov. 1896. 



66. GuiRA piririgua (Vieill.). 



Guira giara Shelley, B. M. C. B. xix. p. 433. 

 Villa Concepcion, Oct. 1896. Common. 

 W., Nov. 1896. 



Fam. XIX. Rhamphastid^. 



67. Rhamphastos toco Miill. 



Villa Concepcion, flock of five, Sept. 28 ; near Riacho 

 Verde, Oct. 25. 



Fam. XX. Psittacid^. 



68. Ara auricollis (Cass.). 



Macaws apparently belongfing to this species were observed 

 on several occasions near the Riacho Verde, but I was unable 

 to get within shot. 



69. CoNURUs acuticaudatus (Vieill.). 

 W., Nov. 4. 



70. CoNURUs NENDAY (Vieill.). 



Near Carayd Vuelta, Oct. 23 ; Oct. 26, common near 

 Riacho Verde. 



W., Nov. 1896. Very common in large flocks. 



71. Brotoqerys chirtri (Vieill.) (?). 

 Lengua, Ydtupkdsik. 



W., Jan. 14. 



I shot a single specimen of a small Parrot with a yellow 



