505 
Ibises of the Genus Theristicus. 
(3) Theristicus branickii. 
1. Adult male, Pariayacu, Peru, 18 October, 1892 (./. 
Kalinowski, Mus. Berlepsch , Specim. typicum). 
2. Adult male, Yallevicioso, Paramo del Cotopaxi, July 
(Dr. E. Festa). 
3. Adult male, Vallevicioso, July (Dr. Festa). 
4. Adult male, Yallevicioso, July (Dr. Festa). 
5. Immature male, Yallevicioso, July (Dr. Festa). 
6. Adult female, Yallevicioso, July (Dr. Festa). 
7 & 8. Young specimens, Yallevicioso, July (Dr. Festa). 
Genus Theristicus Wagl. 
Type. 
Theristicus Wagl, Isis, 1832, p. 1231 . Ibis melanopis Lath. 
Wagler gives the following characters of the genus 
Theristicus :— 
“ Rostrum gracilius (quam in genere Ibidis) ; pedes breves, 
robusti ; tarsus validus, digiti intermedii longitudine 
incluso hujus ungue, antice scutellis hexagonis tectns, 
postice reticulatus; digiti validi, breviusculi, teretius- 
culi; ungues mediocres, validi, arcuati, illi digiti 
anterioris intermedii acie interna subinflata (integra) ; 
acrodactyla elevato-scutellata. Ptilosis: lora ac stria 
utrinque ad latus menti nuda; aloe et cauda prselongse, 
hsec euneata, alas transcendens; pilei ac colli plumye 
longse, lacerse. Color praedominans obscurus et dilutus, 
remiges et cauda metallici.” 
Dr. Sharpe has recently given the characters of the different 
genera belonging to the family Ibididce ; those of the genus 
Theristicus may be summarized as follows :— 
“ Anterior aspect of tarsus reticulated, with numerous 
hexagonal scales ; inner secondaries ordinary, not orna¬ 
mented ; head feathered ; lores bare, no fleshy wattle on 
centre of throat; forehead feathered ; lores with some warty 
papillse, region of eye bare; sides of chin and upper throat 
bare ; no crest of dependent feathers on nape.” 
To these characters those of the colouring may be added, 
being very similar in all the species. General colour slaty 
grey, head and neck whitish buff; upper part of the head 
