20 Genera of Humming Birds. 



Genus XI. Tilmatura, Keich, Aufz. der Colib. 1853, p. 8. 



Tryphaena, Grould, Int. Troch, 1861, p. 96. 



Type : 0. Duponti, Lesson. 



Bill straight, long as the head. Wings short. Tail deeply 

 forked, outermost feather tapering rapidly at tip and curved 

 inwards. Sexes unlike. 



Habitat — Mexico and Gfuatemala. 



30. Tilmatura duponti. Less, Ois. Mouch Suppl. 1829, 



p. 150. 



Ornysmia coelestis. Less, Trait. Ornith, 1831, p. 276. 



Ornysmia zemes, Less, Kev. Zool, 1838, p. 315. 



Mellisuga duponti, Grray, Gren. of Birds, vol. i., p. 113. 



Tryphaena duponti, Bon., Consp., Gen. Av., 1850, p. 84. 



Tilmatura lepida, Keich, Aufz der Colib., 1853, p. 8. 



Thaumastura duponti, Bon., Eev. and Mag. Zool, 1854, 

 p. 257. 



Trochilus duponti, Jard, Nat. Lib. Hum. Birds, vol. i., p. 131. 



Sparkling Tail Humming Bird, Gould, Mon. of Troch., 

 vol. iii., p. 158. 



Le Tilmature de Dupont, Muls. Hist. Nat. Ois. m. t. iv., 

 p. 12. 



Habitat. — Mexico and Guatemala. 



Male. — Upperside dark golden-green. Throat deep metallic 

 blue. Breast white. Abdomen and flanks, dark shining 

 green, edged with light gray. Median rectrices shining green, 

 next one dark brown, the others rufous at base, then black with 

 a white spot, then dark brown tipped white. Bill black. 



Total length 4 in. Wing 1|. Tail 2. Culmen f . 



Female. — Upperside bronzy-green. Underside buff. Throat 

 paler, speckled in the centre with brown spots. Centre of 

 abdomen white. Middle tail feathers green at base, remaining 

 part black tipped with white. Bill black. 



Total length, 2f in. Wing, 1|. Tail, i. Culmen, |. 



Dedicated by Lesson to M. Dupont, a dealer naturalist of 

 Paris. 



It is a scarce species. I have killed several specimens at 

 Cordoba, Mexico. It is more abundant in Guatemala. 



