Dr. P. L. Sclater on a new Species of Tetragonops. 371 
XXX.— On a new Species of Tetragonops. By P. L. Sclater, 
M.A., Ph. D., F.R.S., &c. (Plate X.) 
Through the kindness of Prof. Baird, of the Smithsonian In¬ 
stitution, Washington, I am enabled to devote the final plate of 
this series of f The Ibis 3 to the illustration of one of the most 
interesting novelties that I have met with since I commenced 
my editorial duties. In former volumes of this Journal I have 
written upon the American Barbets*, and given a figure of the 
anomalous form Tetragonops ramphastinus , which connects this 
group with the Toucans. I have now the pleasure of making 
known to my readers the existence of a second species of the 
same genus, which has been lately discovered by Dr. A. von 
Frantzius in the mountains of Costa Rica, and which Prof. Baird 
proposes to call, after its discoverer, 
Tetragonops frantzii, sp. nov. (PL X.) 
Olivaceus : macula nuchali elongata nitente nigra: capite un- 
dique cum cervice, pectore et ventre medio flavido-fulves- 
centibus : semi torque pectorali utrinque cinereo, medialiter 
fere obsoleto : ventre imo crissoque olivaceis, medialiter fla- 
vicantibus : rostro plumbeo, apice pallido : pedibus nigris. 
Long, tota 7*4 poll., alse 3*4, caudae 2*3, rostri a rictu 0*8, 
tarsi 1*0. 
Hab . in int. reipubl. Costa Rica. 
Mus . Smithsoniano. 
The new species of Tetragonops is of considerably smaller size 
than the type species, Tetragonops ramphastinus , and so different 
in colouring that there is no possibility of their being con¬ 
founded together. In general characters it is not so strongly 
marked, and is to some extent intermediate between Capito and 
Tetragonops , although certainly to be placed in the latter genus. 
The bill is relatively as short as in T. ramphastinus; the keel 
between the nostrils is much elevated, and brought to a sharper 
edge than in the latter, but outside the nostrils is bevelled off at 
once, instead of being extended into a broad flattened surface. 
The curious bifurcation of the extremity of the lower mandible* 
exists likewise in the new species. 
The wings are short, reaching to about one-third of the dis- 
* See ‘Ibis/ 1861, p. 182, and 1862, p. 1. 
