252 TANAGEIDiE. 



This interesting species is only known to us from two specimens obtained in the 

 island of Cozumel by Dr. Samuel Cabot, at the time he accompanied Stephens in his 

 explorations of the ancient ruins of Yucatan and Central America. One of these 

 specimens is now in the Museum of the Boston Society of Natural History, where Salvin 

 saw it in 1874, and where a sketch of it was taken ; the other, the type of Prof. 

 Baird's description, remains in Dr. Cabot's collection. Dr. Cabot only noticed this species 

 on Cozumel, where, however, it was quite numerous *. 



The nearest ally of C. caboti is the Bahama species of Certhiola, C. bahamensis, from 

 which it differs in having the yellow of the underparts more extended, the superciliary 

 stripe less produced, the alar speculum squarer, and the tail less conspicuously tipped 

 with whitish. 



The close relationship of C. caboti to C. bahamensis is interesting, seeing that no 

 species of Certhiola has as yet been discovered in the intervening island of Cuba, though 

 hardly any other West-Indian island is without a representative of the genus. 



Pam. TANAGRID^t. 



Subfam. EUPHONIINJE. 



CHLOROPHONIA. 



Chlorophonia, Bonaparte, Rev. Zool. 1851, p. 137 (type Tanagra viridis, Vieill.) ; Scl. P. Z. S. 



1856, p. 269. 

 Triglyphidia, Reichenbach, Av. Syst. Nat. t. 63. 

 Acrocompsa, Cabanis, J. f. Orn. 1861, p. 89. 



This genus is probably hardly structurally separable from Euphonia, with which it 

 has much in common. The most obvious distinction is that of the ptilosis, each 

 feather having its barbs towards the end destitute of barbules, whereas in Euphonia the 

 barbules extend to the end of the barbs ; and thus the general appearance of the plumage 

 in Ewphonia is softer and closer than in Chlorophonia, which has a more wiry, coarser 

 look. The bill of Chlorophonia is shaped just as in the allied genus ; but is perhaps 

 more feeble and wider towards the base. In both genera the edge of the maxilla 

 below the nostril is expanded. At the end of the maxilla is a strong hook, and a single 

 well developed dentate process. In Euphonia there are usually, but not always, several 

 of these processes, giving a serrate edge to the maxilla. The mandible in Chlorophonia is 

 somewhat swollen at the base, and upturned towards the point. The nostrils are open 

 and at the end of the nasal fossa ; the frontal plumes stiff and directed forwards. The 

 rictal bristles are short but stout ; and the tarsi short and the feet feeble. 



* ' Inc. of Travel in Yucatan,' ii. p. 472. 



t In the arrangement of this Family we have foUowed almost exactly that of the 'Nomenclator Avium 

 Neotropicalium,' which is based upon Sclater's ' Catalogue of American Birds' and other works of the same 

 author. 



