382 REPOET OF NATIONAL MUSEUM, 1890. 



Genus AGYRTRIA Reichenbach. 



Thaumantias Bonap., Rev. et Mag. Zool. 1854, 255 (nee Escholtz, 1829). 

 Thaumatias Gould, Introd. Troch. oct. ed. 1861, 151 (nee Bonap., 1850). 

 Agyrtria Reich., Troch. Euutn. 1855, 7. Type, Trochilus brevirostris Less. 

 Leucodora Muls., Hist. Nat. Ois. Mouch. i, 1873, 309. Type, Trochilus norrisii Bourc. 



Generic characters. — In what the characters of this supposed 

 genus really consist, I have not been able to discover, either by a care- 

 ful examination of specimens or by consulting the various works which 

 recognize it. The various species referred to Agyrtria are essentially 

 identical in structure with the species referred to Amazilia, and in my 

 opinion should be placed in the same genus with them. Other so-called 

 genera, as Uranomitra, Timolia, Uucephala, Arinia, and Callipharus, are 

 also involved in the uncertainty. (See p. 3C2.) 



Taking the single species which has been mentioned as a North 

 American bird, together with all the Central American species which 

 have been placed in the same so-called genus, we have four species of 

 Agyrtria whose differential characters are as follows : 



a 1 . Throat aud breast green. 



ft 1 . Outer tail-feather blackish, with dusky gray tip. Hab. Tobago, Trinidad, and 

 Venezuela to Brazil; accidental in Massachusetts? 



A. tobaci (Gmel.) Tobago Humming Bird. (Page 382.) 

 & 2 . Outer tail feather bronzy green, with dark purplish bronze sabterminal baud 

 and gray tip. Hab. Honduras. A. lucice (Lawk). Lucy's Humming Bird.* 

 a 2 . Throat and breast white. 



ft 1 . Belly pure white, flanks green. Hab. Mexico to Nicaragua. 



A. Candida (BouRC. and Muls.). White-breasted Humming Bird. t 

 b 2 . Belly and flanks pale rufous. Hab. Mexico. 



A norrisii (Bourc). Norris's Humming Bird.t 



Tobago Humming Bird. Agyrtria tobaci (Gmel.). 



Trochilus tobaci Gmel., S. N. i., 1788, 498. 



Agyrtria tobaci Elliot, Class, and Synop. Troch., 1879, 206. 

 Thaumatias linnwi Gould, Mon. Troch., pt. xn, 1856, pi. 4, vol. V, 1861, pi. 302. — B. B. 

 and R. Hist.N. Am. B., n, 1874, 468.$ 



Agyrtria linncei Coues, Key, 1872, 186. 

 Trochilus maculatus ViEiLL.,Ois. Dor., I. 1802, 87, pi. 44. 



Agyrtria maculata Cab. and Heine, Mus. Hein.,in, 1860, 33.— Mayn., B. E. Mass., 



1870, 128 (Cambridge, Mass.).— Allen, Am. Nat., in, Feb., 18?0, 645 (do.). 

 Linnteus's Emerald (Gould). 



Le Thaumatias de Linne (Mulsant and Verreaux). 

 Linne" Humming Bird (Coues). 



* Thaumatias lucice, Lawr. Pr. Ac. Nat. Sci., Phil., 1867, 233. Agyrtria luciw, Elliot, 

 Class, and Synop. Troch., 1879, 208. 



t Trochilus candidus, Bourc. and Muls., Ann. Soc. Ag., Lyons, ix, 1846, 326. Agyr- 

 tria Candida, Cab. and Heine, Mus. Hein., iii, 33. 



X Trochilus norrisii, Bourc, P. Z. S., 1847, 47. Agyrtria norrisii, Elliot, Class and 

 Synop. Troch., 1879, 204. 



$ Not Thaumantias linncei Boa ap., Rev. et Mag. Zool., 1854,255, based on Trochilus 

 thaumantias Linn, (S. N. ed., 12, i, 1766, 190), which is certainly not this species. 



