494 TEOGONID^. 



Panama, Volcan de Chiriqui ^, Bugaba ^, Cordillera de Tole ^, Chitra ^, Calovevora 8, 

 Santiago de Veraguas '', Santa Fe ^ (JrcS), Lion HUl {M'Leannan ^ ^^ ^^), Chepo 

 (Arce), Truando E, (C. J. Wood^). — South America generally in forest country, 

 from Colombia to Guiana and Brazil ^2. 



This Trogon, in one or other of its forms, has been long known. The Brazilian bird 

 was figured by Edwards in 1758 as the "Yellow-bellied Green Cuckoo," a species 

 mentioned in the earlier work of Marcgrave. Upon the female of the Guiana form 

 the name of "CouroucOu a queue rousse de Cayenne" was bestowed by Buffon, and 

 figured by D'Aubenton in the ' Planches Coloriees des Oiseaux,' and this subsequently 

 became the Trogon rufus of Gmelin. The male, also from Guiana, was described by 

 Vieillot in 1817 as Trogon atricollis. Other titles were subsequently bestowed npon 

 it, amongst these Trogon chrysochloros by v. Pelzeln on the Brazilian bird, and Trogon 

 tenellus by Cabanis on that of Costa Rica. It is with the latter that we have now 

 to deal. 



A revision of the large series of skins of T. atricollis in the British Museum, supple- 

 mented with additions to the list in Mr. Grant's catalogue, mostly from Nicaragua, 

 show that the notes on the variation of the species supplied by Salvin to Gould for the 

 second edition of the ' Ti'ogonidse ' are fully confirmed. They are briefly as follows: — 



Central America [Nicaragua to Panama). — The male has the central rectrices of a 

 rather bluer shade of green ; the bars on the outer tail-feathers are wider and fewer, 

 and the abdomen is clear yellow with hardly any shade of orange. 



Colombia (Cauca Valley). — The central rectrices are not tinged with blue, but have a 

 slight bronze tint; the barring of the tail agrees with that of the Central-American 

 bird, and there is a slight tinge of orange on the breast. 



JEastern Ecuador {Sarayacu). — The central rectrices are of a deeper bronze tint than 

 any of the series, the bands of the outer rectrices being wide as in more northern 

 examples ; the abdomen is still deeper orange. 



Guiana. — Central rectrices slightly bronze as in the Cauca Valley birds, the bands of 

 the outer rectrices being rather narrower, the abdomen slightly orange. 



Brazil. — Tail rather long, central rectrices slightly tinged with bronze, outer rectrices 

 more narrowly and more numerously barred, the abdomen slightly orange. 



These characters, always very slight, are not absolutely restricted to the birds of 

 these districts, but indicate rather their general features. It will be thus seen that if 

 any separation is to be made the number of divisions can hardly be confined to two. 

 We think ourselves that this is one of those cases where a single name will be found 

 sufficient, the variation being acknowledged. 



The range of Trogon atricollis in Central America reaches as far as Eastern Nicaragua, 

 where it was noticed by Belt, who, writing of it and T. caligatus, says (' Naturalist in 

 Nacaragua,' p. 122), " Both species take short, quick, jerky flights, and are often met 



