122 S Y x\ O 1' S 1 S OF THE H U M M 1 N G- E I R D S. 



Female. Precisely like that of C. jourdanl. Total length, -2\ in. Wing, 1^^ in. 

 Tail, ji in. Culraen, ^^ in. The above descriptions are taken from the types iu 

 my collection. 



3. Chaetocercus bombus. 



Chcelocercus bombus, Gould, P. Z. S. (1870), p. 804. 



Polyxcmus bombus, MuLS., Hist. Nat. Ojs. Mouch., torn, iv, p. 123 (1877). 



ffab. Citado in Ecuador. 



3Iale. Upper parts and abdomen dark bronze-green. Throat metallic-crimson, 

 beneath which is a broad buff band, that extends on to the sides of the neck. Tail 

 purplish-black, inner web of third rectrices margined with buff at the base. Bill 

 black. Total length, 2^ in. Wing, 1 in. Tail, f in. Cuhuen, -j^^ in. 



Female. Above green, beneath deep buff. Tail deep buff Avith a subterminal 

 black bar. Bill black. Total length, 2| in. Wing, 1 y\ in. Tail, ii in. Culmon, 

 I in. (Typical examples.) 



Genus LXIII.— THAUMASTURA. 



Type. 



Ph (etornrs, Tschud. (nee Swains., 1827), Consp., p. 37 (1844). 0. cora. Less. 



Thaumastura , Bon., Consp. Gen. Av. (18.50), vol. i, p. 85 (nee Compt. Kend., p. 383, 1850). O. cora. Less. 

 Cora, "Keicu.", Bo.n., Ann. Sc. Nat. (1854), p. 138. 0. cora, Less.? 



Fig. 71. 



Thaumastvra cora- <? . Islay, Fem. TYhiteJy. 



Ch. Bill short, straight, wide at base. Wings long. Tarsi partially clothed. 

 Middle pair of rectrices almost hidden iu coverts, next on either side greatly 

 elongated and longest, remainder much shorter and decreasing in length to the 

 outermost one. All are very narrow, but of uniform width for their entire length. 



Range. Peru. 



One species only is known, small in size, with a strangely shaped tail as described 

 above ; a brilliant throat, and green and white plumage. The male, as is the case 

 in all these genera, is the only sex adorned with metallic colors, the female being 

 plainly dressed, and with a short tail of moderately broad feathers. 



This genus was established by Bonaparte in the Comptes Rendus for 1850, giving 

 as his types the 0. vesjjer, Less., and the 0. fanny. Less.; the 0. cora, Less., not 

 being mentioned. In the Conspectus Avium of the same year, however, he places 

 the latter species, together with those given in the Comptes Rendus, in his genus 



