174 TROCHILI. 



the sexes is only suggested by the fact that in TrocJiilidce generally 

 the lateral rectrices of the females are, as a rule, tipped with 

 lighter colour than those of the males. 

 Hah. Andes of Eastern Ecuador. 



a. Ad. ? sk. Banks of the Eiver Napo ?, Gould Coll. 



Ecuador (Bourcier). (Type of the species.) 



b, c. Ad. ? sk. Loxa, Ecuador {Buckky). Salvin-Godman Coll. 

 d-o. Ad. ? sk. Ecuador {Buckley). Gould Coll. 



48. POLYTMTJS. 



Type. 



Polytmus, Briss. Orn. iii. p. 667 (1760) P. thaumantias. 



Chrysobronchus, Bj). Rev. Zool. 1854, p. 252. 



Mange. South America from Colombia, Venezuela, and Trinidad 

 to Guiana and South-eastern Brazil. 



P. thaumantias has the nasal covers less exposed than either 

 P. viridissimus or P. leucorrlious ; moreoTcr, the tail is more rounded, 

 being almost cuneate, and tipped and edged with white. The 

 interramal space is more feathered in P. thaumantias than in either 

 of the other species ; so that it becomes a question whether they 

 should aU be referred to one genus. No attempt has as yet been 

 made to make a separation, and I am hardly prepared to do so at 

 present. 



Key to the Species. 



a. Tail more rounded, lateral rectrices tipped and 



edged with white ; interramal space more 



feathered thaumantias, p. 174. 



b. Tail less rounded, lateral rectrices uniform green ; 



interramal space less feathered. 



a' . Under tail-coverts glittering green viridissvmts, p. 176. 



b'. Under tail-corerts white leucorrhous, p. 176. 



1. Polytmus thaumantias. 



Polytmus, Briss. Orn. iii. p. 667. 



Trochilus thaumantias, Linn. Syst. Nat. i. p. 190 ; Gm. Syst. Nat. 



i. p. 489 ; Vieill. N. Diet. d'Hist. N. vii. p. 353 ; id. Enc. MHh. 



p. 557. 

 Colibri, Daub. Fl. D?il. 600. fig. 1. 

 Petit Colibri, Buf. Hist. Nat. Ois. vi. p. 64. 

 Admirable Humming Bird, Lath. Syn. i. 2, p. 763. 

 Trochilus viridis, Atid. 8f Vieill. Ois. Dor. i. p. 101, pi. 41 ; Vieill. N. 



Diet. d'Hist. N. vii. p. 354 ; id. Enc. Meth. p. 557 ; Less. Ind. 



Gin. Troch. p. xxvii ; d^Orb. 8f Lafr. Syn. Av. ii. p. 32; Cab. in 



Schomb. Guiana, iii. p. 707. 

 Trochilus chrysobronchus, Shaw, Gen. Zool. viii. p. 287. 

 Trochilus virescens, Dumont, Diet. Sc. Nat. x. p. 49 (1818) ; Wied, 



Beitr. iv. p. 107. 

 Ornismva viridis, Less. Hist. Nat. Ois.-Mouches, pp. xxxiii, 178, 



pi. 60. 



