Genera of Humming Birds. 173 



This species was discovered in Veragua, by Mr. 

 Warszewicz. 



My specimens were collected in the same country, by 

 Arce ; others I collected in Costa Rica. These appear to be 

 slightly smaller than the specimens from Veragua, but I don't 

 think they can be separated. 



Genus LXXIV. Lawrencius, n.g. 



Type : — P. cupreiceps, Lawrence. 



Bill about the length of the head, strongly curved, gradu- 

 ating to a very acute point. Wings long, reaching the end of 

 tail. Tail rounded. Median and outermost rectrices wide, 

 slightly shorter than the others. Feet large for the size of 

 the bird. Tarsi partly clothed. Nostrils partly exposed. 

 Sexes unlike. 



Habitat. — Costa Rica. 



249. Lawrencius cupreiceps, Lawr., Ann., N.Y., Lye. Nat. 

 Hist., 1866, vol. viii., p. 348. 



Thaumatias cupreiceps, Sclat. and Salv., Nomencl, 1873, 

 p. 92. 



Elvira cupreiceps, Muls., Hist. Nat. Ois. Mou., 1874, t. i., 

 p. 268. 



Copper Crown, Gould, Mon. Troch., Suppl., 1886, p. 82. 



V Elvire à tête cuivreuse, Muls., Hist. Nat. Ois. Mou., 1874, 

 t. i., p. 268. 



V Elvire de Lawrence. 



Habitat. — Costa Rica. 



Male. — Top of head metallic bronze at base of maxilla, 

 then shining coppery. Upperside golden-green. Uppertail- 

 coverts coppery-red. Median rectrices shining bronze with 

 reddish reflections, lateral pure white with a tinge of grayish 

 margin at tips. Underside luminous metallic emerald-green 

 with golden reflections. Anal region and thighs white. 

 Wings purplish-brown. Maxilla black. Mandible flesh 

 colour, with black tip. 



Total length, 3J-in. Wing, i|. Tail, if. Culmen, y 5 ¥ . 



Female. — Upperside shining green. Slightly coppery on 

 head. Uppertail coverts coppery. Median rectrices shining 



