m 
Ibises of the Genus Theristicus. 
iibus; alarum tectricibus minoribus et mediis cinereis 
albido limbatis; alarum tectricibus majoribus albis vittam 
longitudinalem maximam form antibus ; remigibus ac 
cauda conica elongata nigris, met allice e viridi resplen- 
dentibus ; remigum secundariorum basi obtecta alba: 
rostro nigro; iride rubra ; pedibus colore roseo geranii. 
Long. tot. circa 750 mm. ; al. 440 ; caud. 230; rostri 
culm. 170 ; tarsi 86. 
Junior. Pelle nuda frontis et capitis laterum lsevi, baud 
verrucosa ; plaga pallida alse sordide alba. 
Had. Cayenne {Buffon), Guiana Britannica ( ScJwmburgk, 
Whitely) ; Venezuela, Orinoco et Zulia (fide Ernst), Alta- 
gracia ( Cherrie ) ; Colombia, Bogota et Antioquia (Mus. 
Bert.); Brasilia, Santarem {Allen), Pernambuco [Marc- 
grave], Bahia ( Wied ), Paracatu, Bio S. Francisco {Lund), 
Matto Grosso {Natterer, Smith), S. Paulo et Parana 
{Natterer), Rio Grande do Sul (Wied); Bolivia, Valle Grande 
{Garlepp, in Mus. Berlepsch) ; Paraguay ( Azara ), Bio 
Pilcomayo {Kerr) ; Uruguay {Barrows) ; Northern Argen¬ 
tina, Salta ( Durnford, Borelli), Tucuman, Parana, Mendoza 
{Burmeister) , Cordova ( Frenzel). 
This species is easily distinguishable, having the breast 
black like the rest of the underparts, a broad white band on 
the wings, formed by the greater wing-coverts, and the 
hidden base of the secondaries white, also by the rusty- 
fulvous colour of the cap and of the two spots at the base 
of the neck, one anterior and the other posterior. 
As stated above, I have examined nine specimens of this 
species. The first is from Cayenne, the very locality in¬ 
habited by the type-specimen, figured by Daubenton, on 
which were based both Scolopax caudatus Bodd. and Tantalus 
albicollis Gm. This specimen is strikingly similar to the 
figure, and remarkable for its great size, and the numerous 
warts on the naked skin of the forehead and sides of the 
head. 
Scarcely different from it are the two specimens from 
Venezuela, and two others from Colombia (Bogota and 
Antioquia), sent to me by Graf von Berlepsch ; the only 
difference of any importance is in the colour of the lower 
