516 
On the Ibises of the Genus Theristicus. 
notatis; dorso et scapularibus fusco-cinereis, plumis 
pallidius marginatis et fascia subapicali fusca notatis; 
tectricibus alarum minoribus cinereis, albo marginatis; 
tectricibus mediis et majoribus cinereo-albidis ; lateribus 
fusco-nigris ; remigibus, cum subalaribus et axillaribus, 
cauda ac crisso nigris, nitore viridi indutis : “ rostro 
nigricante ; pedibus sordide virescentibus 39 ( Festa ). 
Hab. Peruvia alta, La Puna ( Tschudi), Pitnmarca (prope 
Tinta) ( Whitely ), Junin, Lima, Huanta, Maraynioc ( Jelski ), 
Maraynioc, Pariayacu (. Kalinowski ) ; iEquatoria alta, 
Yallevicioso (Cotopaxi) (Festa). 
This species resembles T. melanopis in having the wing- 
coverts grey and a transverse grey band on the breast, but 
is easily distinguished by the breast and abdomen being 
white. 
I have examined eight specimens of this species : one of 
them was collected by Kalinowski at Maraynioc, Pariayacu ; 
this is labelled as the type and has been lent to me by 
Graf von Berlepsch, to whom it belongs; the other seven 
were collected by Dr. Festa in Ecuador. 
The first (Plate IX.) is remarkable for the rusty-fulvous 
colour of the pileum and cheeks ; the same colour, somewhat 
paler, spreads over the neck. 
The specimens collected by Dr. Festa in Ecuador are 
four males, one female, and two young birds not sexed. 
The four males and the female show very slight differences ; 
none of them have the head and neck of a rusty-fulvous 
colour so bright as in the type-specimen from Peru. Two, 
apparently fully adult, have the upper parts almost uniform 
grey, slightly paler on the wing-coverts. One, evidently the 
youngest, has the head and neck almost entirely white, with 
some fulvous feathers on the nape and lower part of fore neck j 
besides it has the smaller wing-coverts with whitish edgings 
and subapical bands or spots dusky grey, sure signs of being 
immature. 
Lastly, the two young birds (Plate X.) are very remarkable 
in having the head and neck dull white-fulvous, with dusky 
streaks along the shafts of the feathers ; besides, they have the 
white feathers of the lower parts streaked with grey along the 
