igi8. CATALOGUE OF BIRDS OF THE AMERICAS CORY. 275 



Chakostigma ruficeps (typica) HARTERT; Das Tierreich, 1900, p. 170. 



Range: Bolivia. 

 2: "Bolivia." 



Chalcostigma ruficeps aureofastigatum a Hartert. NORTHERN RUFOUS- 

 CAPPED THORN-BILL. 



Chalcostigma ruficeps aureofastigatum HARTERT, Nov. Zool., VI, 1899, p. 74 

 (Loja); Id., Das Tierreich, 1900, p. 171. 



Range: Ecuador and northern Peru. 

 i: Peru (Molinopampa) . 



Genus RHAMPHOMICRON Bonaparte. 



Rhamphomicron Bonaparte, Compt. Rend. ,1850, p. 382 (Type Ornismya 

 microrhyncha Boissonneau). 



*Rhamphomicron microrhynchum (Boissonneau). SMALL-BILLED 

 THORN-BILL. 



Ornismya microrhyncha BOISSONNEAU, Rev. Zool., 1839, p. 354 (Bogota). 



Trochilus brachyrhynchus FRASER, Proc. Zool. Soc. Lond., 1840, p. 16. 



Rhamphomicron microrhynchum TACZANOWSKI, Orn. Perou, I, 1884, p. 349; 

 ELLIOT, Syn. Trochil., 1879, p. 160; SALVIN, Cat. Bds. Brit. Mus., XVI, 

 1892, p. 342; OBERHOLSER, Proc. U. S. Nat. Mus., XXIV, 1902, p. 335 (Papel- 

 lacta and Pichincha, Ecuador). 



Rhamphomicron microrhynchus GOULD, Mon. Trochil., Ill, 1852, pi. 189. 



Rhamphamicrum microrhynchum HARTERT, Das Tierreich, 1900, p. 171; CHAP- 

 MAN, Bull. Am. Mus. N. H., XXXVI, 1917. p. 307 (Andes west of Popayan; 

 Almaguer; Laguneta; El Roble; El Pinon, Colombia). 



Range: Venezuela, Colombia and Ecuador. 

 10: "Colombia" 5; "Ecuador" 5. 



Rhamphomicron dorsale Salvin and Godman. BLACK-BACKED THORN- 

 BILL. 



Rhamphomicron dorsale SALVIN and GODMAN, Ibis, 1880, p. 172 (Santa Marta); 

 SHARPE in Gould's Mon. Trochil., Suppl., 1883, pi. 43; SALVIN, Cat. Bds. 

 Brit. Mus., XVI, 1892, p. 343. 



Range: Northern Colombia. 



Chakostigma ruficeps aureofastigatum HARTERT: Differs from C. r. ruficeps 

 from Bolivia in having the tip of the gular stripe golden (not uniform green). 



