134 Mr. C. H. B. Grant on Birds collected in Argentina, 
The November specimens are very much worn and that 
from Bella Vista has started its moult. 
Many individuals of this Thorn-bird were observed at 
Colonia Mihanovitch and several nests were examined, but 
none contained eggs, though the female shot on the 5th of 
November was laying. 
The nest is a fair-sized structure of sticks suspended 
from the overhanging branches of a tree, the entrance 
being from below and the nesting-chamber near the top. 
124. Homorus cristatus. 
Homorus cristatus Scl. Cat. B. xv. p. 86. 
Pseudosizura cristata Sharpe, Hand-1. B. iii. p. 65 (1901). 
a. $ ad. Pasage de Bagre, Brazil. Sept. 29, 1909. 
Irides pale yellow; bill blue-slate-coloured; legs and toes 
olive-green. 
125. SlTTASOMUS CHAPADENSIS. 
Sittasomus chapadensis Ridgw. Pr. U.S. Nat. Mus. xiv. 
p. 509. 
a. ? ad. Riacho Ancho, N. Argentine. July 30, 1909. 
b. $ ad. Pan de Azucar, Brazil. Sept. 20, 1909. 
Irides brown ; bill, legs, and toes slate-coloured. 
126. XlPHOCOLAPTES MAJOR. 
Xiphocolaptes major Scl. Cat, B. xv. p. 145 ; Arg. Orn. i. 
p. 201; Chubb, Ibis, 1910, p. 532 (Paraguay). 
a. J ad. Puerto San Juan, Paraguay. Aug. 26, 1909. 
b, ? ad. Near Villa Pilar, Paraguay. Nov. 7, 1909. 
Irides rich red-brown ; bill pearly slate-coloured; legs 
and toes dark olive-green. 
The female is of a brighter colour on the head than the 
male, and was laying. 
127. PlCOLAPTES ANGUSTIROSTRIS. 
Picolaptes angustirostris Scl. Cat. B. xv. p. 155 ; Arg, 
Orn. i. p. 201; Chubb, Ibis, 1910, p. 534 (Paraguay). 
a. £ ad. Riacho Ancho, N. Argentine. Aug. 1, 1909, 
