270 TANAGEID^. 



4. Calliste gyroloides. 



Aglaia gyroloides, Lafr. Eev. Zool. 1847, p. 277 '. 



Calliste gyroloides, Scl. P. Z. S. 1856, pp. 142 % 255 ^ 1857, p. 264 ^ 1859, p. 139'; Mon. Call, 

 p. 57, t. 26«; Law. Ann. Lye. N. Y. vii. p. 332'; ix. p. 98'; Scl. & Salv. P. Z. S. 1864, 

 p. 350 ^ 1879, p. 499'°; Salv. P. Z. S. 1867, p. 138"; 1870, p. 186"; v. Frantz. J. f. 

 Om. 1869, p. 298"; Wyatt, Ibis, 1871, p. 325". 



Aglaia gyrola, d'Orb. & Lafr. Syn. Av. i. p. 32" (nee Linn.). 



Tanagra gyrola, d'Orb. Voy. Am. Mer. vi. Ois. p. 272'°. 



Aglaia peruviana, Swains. An. in Menag. p. 356". 



Calliste cyanoventris, Gray, Gen. Birds, ii. p. 366 ". 



Supra clare viridis, capite et mento castaneis, torque nuchali et humeris aurescentibus ; dorso postico et abdo- 

 mine toto cseruleis ; crisso viride ; tibiis pallide rufis ; rostro et pedibus obscure corylinis. Long, tota 5-5, 

 alee 3*0, caudae 2-0, rostri a rictu 0'6, tarsi 0'7. 



$ mari similis, sed coloribus omnibus paulo obscurioribus. (Descr. maris et feminse ex Lion Hill, Panama. 

 Mus. nostr.) 



Av. juv. fere omnino viridis subtus pallidior. (Descr. av. bomot. ex Calovevora, Panama. Mus. nostr.) 



Hob. Costa Eica, Savanilla de Pirris {v. Frantzius ^^), Barranca, Guaitil, Dota {v. Frant- 

 zius 13, Carmiol ^), Turrialba {Arce) ; Panama, Chiriqui {Bridges ^), Volcan de 

 Chiriqui ^^^ Bugaba '^^, Boquete de Chitra i^, Vivala, Cordillera del Chucu ^^^ Calo- 

 vevora i2j Santa Fe ^^ [Arce), line of railway {WLeannan ^ ^). — South America, 

 Colombia ^ ^'^ ^^ to Ecuador ^ ^, Peru ^ ^'^ and Bolivia i^, Upper Amazons *. 



Some years had expired after specimens of this bird had been obtained before it 

 remained in quiet possession of its present title. At first it was unrecognized from 

 Calliste gyrola of Linnaeus, to which it bears a general resemblance. Swainson then 

 perceiving its differences gave it the name of Aglaia peruviana i'^, unfortunately choosing 

 a title that had already been adopted for a bird of the same genus. The same misfortune 

 attended the name C. cyanoventris chosen for it by G. R. Gray ^^. Finally, in 1847, 

 Lafresnaye called it Aglaia gyroloides^, under which specific name it has since passed. 



C. gyroloides belongs to a group of four well-marked green-backed Calliste. From 

 the Guiana C. gyrola it differs in having the rump and the whole of the underparts 

 blue. The same differences separate it from the Venezuelan C. desmaresti, in which 

 the underparts are wholly green. The green chest and flanks and the chestnut of the 

 primaries of C. lavinice of Central America render it again very easily distinguishable 

 from C. gyroloides. 



In its range C. gyroloides covers a much wider area than any of the other allied 

 species, being found uninterruptedly from Bolivia to Costa Eica. It diverges but little 

 from the slopes of the Andes ; and, though found as far east as the Eio Javarri in the 

 Upper Amazons 4, it would appear to be by no means common anywhere in the valley. 



In all collections made in Ecuador and Colombia C. gyroloides is a conspicuous 

 species, and it would appear to be a very common bird in those countries. It is 

 equally so in the State of Panama, whence numbers of specimens have been sent us. 



