248 
would at once prevent its being confounded with the metatarsus of the 
Din. struthioides. 
The following are the chief dimensions of the bone in question : 
those of the extremities being approximative by reason of their worn 
margins :— 
D. gracilis. 
in. lin. 
Length of the tarso-metatarsus .............. 13 0 
Circumference at the middle of the shaft ...... 43 
Transverse breadth of proximal end .......... 3.4 
Transverse breadth of the distal end .......... 4 3 
Breadth of the middle of the shaft............ bse’ 
Thickness or antero-posterior diameter of ditto.. 1 2 
The depressed surface for the back toe is better marked than in 
the Din. struthioides. 
This paper will appear in the Transactions of the Society, illus- 
trated with figures of the bones. 
2. DESCRIPTION OF A NEW TANAGER OF THE GENUS CALLISTE. 
By Puaiiie Lurvuey Scuater, M.A. 
CALLISTE VENUSTA, Sclater. C. lete ceruleo-viridis : intersca- 
pulio alis caudaque nigris, eodem viridi limbatis : fronte, loris, 
gula summa et auchenio nigris : pileo lateribusque capitis flavis : 
ventre medio crissoque pallide ochraceis : rostro nigro : pedibus 
pallidis. 
Long. tota 4°5 ; alee 2°5; caudze 1°5 poll. Angl. 
Hab. In Nova Grenada et in rep. Equatoriana provincia Quixos. 
I have been acquainted with this pretty Ca/liste for some time, 
but have always considered it as the wanthocephala of Tschudi, and 
have described it as such in my “‘ Synopsis of the genus Calliste”’ in 
the Contributions to Ornithology. But having lately had the oppor- 
tunity of examining Tschudi’s type specimens in the Neuchatel Mu- 
seum, I find that his Callospiza xanthocephala is not this bird, but 
the same as my Calliste lamprotis (Cont. to Orn. 1851, p. 65). That 
species closely resembles the present, but may be distinguished by its 
orange cap and brilliant golden-yellow ear-coverts. 
The extreme inaccuracy of Dr. Tschudi’s figure, which looks more 
like this species than the other, must be my excuse for committing 
this error, in which however I am not alone, as even in the Berlin 
Museum (where Tschudi’s types ought to be known) I have observed 
the present bird called wanthocephala. 
Mr. Gould’s collection from Quixos contained examples of this 
species. My own specimens are from Santa Fe di Bogota. 
London, Noy. 1854. 
