4g SYXOrSIS OF THE HUMMING-BIRDS. 



Hah. Vonezuela and Columbia. 



Male. Upper surface broir/c-grcen, becoming a brigbtcr bronze on the upper tail 

 coverts. Entire under surface shining emerald-green. Under tail coverts are pure 

 white, and greatly developed. Wings puvplc-brown. Tail bluish-black, glossed with 

 bronze, this latter color most conspicuous on the middle feathers. Bill black. 

 Total length, 4| in. Wing, 2| in. Tail, l\ in. Culmen, 1 in. Specimens from 

 Venezuela have the tail feathers frequently very much glossed with bronze, and 

 this style has been named ccneicauda by Lawrence. 



Female differs in having the chin grayish-white, rest of under surface gray, the 

 feathers tipped with green. Median rectrices bronze-green, tips blue-black, lateral 

 ones blue-black tipped with white. Rest like the male. 



*2. Chalybura urochrysea. 



Hyiinroptila urochrysea, Gould, P. Z. S. (1801), p. 198.— Id., Mon. Trocli., vol. ii, pi. 90. 



Chalybura urochrysea, Godld, Intr. Troth., octavo ed., p. 72 (1861). 



Lampornis urochrysia, MuLs., Hist. Nat. Ois. Mouch., torn, i, p. 176. — Salv., P. Z. S. (18C7), p. 131. 



Hah. Panama. 



The type, which is unique, differs from the C. hvffoni chiefly in the coloring of the 

 tail, and as we know that specimens of the bird just named, from Venezuela, have 

 frequently bronzy tail feathers, it is very questionable if the present is really a dis- 

 tinct species. 



Mr. Gould's description is as follows; — 



Head and upper surface dark-green, becoming of a bronzy-hue on the wing and 

 upper tail covers : wings purplish-brown ; tail rich golden-bronze both above and 

 beneath ; throat and breast grass-green ; abdomen bronzy-green ; thighs, vent, and 

 under tail coverts pure white, upper mandible black, lower mandible fleshy-red 

 with a black tip. Tarsi yellow or flesh-color. Total length, 4j in. Bill, 1| in. 

 Wing, 2f in. Tail, 1| in. 



3. Chalybura isaurae. 



Hypuroptila isaurce, Goui.d, P. Z. S. (1861). p. 199. 



Chalybura isaurce, Sai,v., P. Z. S. (1867). p 1.31, 9. — Gould, Intr. Trocli., octavo ed., p. 72. 



Lampornis isaurce, MuLS., Hist. Nat. Ois. Moncli.. torn, i, p. 174. 



Hah. Veragua, Costa Rica (Gould). 



Head and back dark grass-green ; rump and upper tail coverts purplish. Wings 

 purplish-brown. Throat and breast very dark blue-green ; flanks dark mouse-color 

 glossed with green. Under tail coverts white. Tail dark bronze, purplLsh on the 

 lateral rectrices. Maxilla black ; mandible flesh-color, tip black. Feet and tarsi 

 flesh-color. Total length, 4^ in. Win" 2^ in. Tail, If in. Culmen, 1 in. The 

 above is taken from a fine adult male specimen, collected by Arce in Veragua. 



Female. Head and upper parts green. Rump and tail shining bronze. Wings 

 brown. Under parts ashy, crissum white. Two lateral rectrices tipped with white. 

 Maxilla biwvnish, mandible flesh-color, tip brown. 



