170 Genera of Humming Birds. 



about two-thirds of their length, the rest bluish-black. Under- 

 side luminous metallic, grass-green in some specimens, in 

 others golden-green. Undertail-coverts white. Base of 

 primaries and secondaries chestnut-red, rest purplish-black. 

 Bill black. Feet flesh colour. 



Total length, 3-fin. Wing, 2\. Tail, \\. Culmen, \^. 



Female. — Upperside golden-green. Underside grayish- 

 white, washed sparingly with green, on sides of breast and 

 flanks. Outermost feathers white for nearly their whole 

 length. 



Total length, 3^in. Wing, 2. Tail, if. Culmen, -i-i. 



Very abundant in Guatemala, where it was discovered by 

 Delattre. 



*245. EUPHERUSA POLIOCERCA, Elliot , Ann. and Mag., Nat. 



Hist., 1871, p. 266. 



Gray Stripe-tail, Gould, Mon. Troch., Suppl., 1886, p. 84. 



V Euphêruse à quene blanche, Muls., Hist. Nat. Ois. Mou., 

 1874, t. i., p. 271. 



Habitat. — Putla, South Mexico. 



Male. — Exactly the same as the preceding species, from 

 which it differs only in having the three outermost rectrices 

 white, with purplish-gray on the edges of outer webs and 

 tips. 



It w r as collected by my traveller, Eugène Reibouch, at Putla. 



I killed that species several years before in Chinantla, Oaxaca ; 

 but I do not know what became of my specimens. Probably 

 they were sold as E. eximia. 



246. EUPHERUSA EGREGIA, Sclat. and Salv., P.Z.S., 1868, 



p. 389. 



Panama Stripe-tail, Gould, Mon. Troch., Suppl., 1886, 



P . 85. 



V Euphêruse distinguée ', Muls., Hist. Nat. Ois. Mou., 1876, 

 t. i., p. 274. 



Habitat. — Costa Rica, Veragua. 



Maie. — Exactly the same as E. eximia, and probably the 

 same species. The only difference which 1 can see in the 

 specimens which I collected in Costa Rica, and others received 



