120 SYNOPSIS OF THE HUMMING-BIRDS. 



Precisely like the following species {A. heliodorl) ; but the feathers of the throat 

 are not prolonged at the sides as in that bird. The present is at best but very 

 questionably distinct, being most probably a specimen of the A. heliodori with the 

 throat feathers not fully developed, examples of which are not infrequently met 

 with, both in this and other genera having species with elongated gorgets. 



3. Acestrura heliodori. 



Ornismya heliodori, Bourc, Rev. Zool. (1840), p. 275.— Id., Ann. Sci. Phys., Lyon, torn, v (1842), p. 308, pi. 



XV, % ; pi. xvi, 9- 

 Mellisuga heliodori, Gray, Gen. Birds, vol. i, p. 113, sp. 66. 

 Calothorax heliodori, Bon., Consp. Gen. Av. (1850). vol. i, p. 85.— Reich., Aufz. der Colib., p. 13 (1853).— 



Goui.D, Mon. Troch., vol. iii, pi. 147. 

 Calothorax heliodorus, Box., Rev. and Mag. Zool. (1854), p. 257. 

 Lucifer heliodori, Reich., Troch. Eniim., p. 10 (1855). 

 Chcetocercus heliodori, Uab. and Hein., Mus. Hein. (I860) Th., iii, p. 60. 

 Acestrura heliodori, Gould, Intr. Troch., octavo ed., p. 92 (1861). 

 Acestura heliodori, Mui.s., Hist. Nat. Ois. Mouch., torn, iv, p. 120 (1877). 



Hah. Venezuela and Columbia. 



Male. Upper surface, abdomen, and under tail coverts dark grass-green. Throat 

 metallic violet-red, feathers elongated on the sides. Breast grayish-white. A patch 

 of white on the flanks near the thighs. Vent white. Tail brownish-black. Bill 

 black. Total length, 2| in. Wing, 1| in. Tail, 1 in. Culmen, \ in. 



Female. Above bronzy-green. Lores and ear coverts dark brown. Under surface 

 deep buff. Tail deep buff, with a subterminal black bar. Bill black. Total length, 

 2\ in. Wing, Ij in. Tail, ^ in. Culmen, \ in. 



4. ^Acestrura micrura. 



Calothorax micrura, Gould, P. Z. S. (1853), p. 109. — Id., Mon. Troch., vol. iii, pi. 148. 



Aceatrura micrura, Gould, Intr. Troch., octavo ed., p. 92 (1861). 



Myrmia micrura, Muls., Cat. Ois. Mouch. (1875), p. 32. — Id., Hist. Nat. Ois. Moucb., torn, iv, p. 113 (1877). 



Hah. Bolivia. 



Male. Upper surface bronze-green. Chin, sides of the throat, and under surface 

 buff. Throat metallic-amethyst. Under tail coverts white. Tail black. Bill 

 black. Total length, 2| in. Wing, \{'^ in. Tail, f in. Culmen, \j% in. 



Female. Above bronze-green. Beneath buff. Tail black. Lateral rectrices 

 tipped with white. 



Genus LXII.-CH^TOCERCUS. 



Type. 

 Chcetocercus, Gray, Gen. Birds (1853), p. 22. 0. jourdani. Bmirc. 



Osalia, Muls. and Verr., Class. Troch. (1865), p. 92. 0. jourdani, Bourc. 



Polyxemus, Muls., Hist. Nat. Ois. Mouch., torn, iv, p. 123 (1877). C. bombtis, Gould. 



