Vol. XVIII 
1901 
] Tenth Supplement to the A. O. U. Check-List. 301 
413. Colaptes cafer (GMEL.). This becomes 
Colaptes cafer collaris ( ViGors), 
Colaptes collaris Vicors, Zool. Journ. IV, 1829, 354-4 
Colaptes cafer collaris Neison, Auk, XVII, April, 1900, 123. 
The true Colaptes cafer is restricted to the tableland and 
mountains of Mexico (cf. NELson, /. Gay 
429.1. Trochilus violajugulum Jrrrrizs. 
This becomes No. 16.2 of the Hypothetical List, on the proba- 
bility that the still unique type was a hybrid or an otherwise 
abnormal specimen. 
Genus AMAZILIA Reicu. (Check-List, 2d ed., p. LT 7 
This becomes 
Genus AMIZILIS Gray. 
Amizilis Gray, List Gen. Bds. 1840, 14. Type (by elimina- 
tion) Orthorhynchus amazili Less. 
Amizilis Gray (1840) antedates Amazilia Reich. (1849). 
Cf. OBERHOLSER, Proc. Acad. Nat. Sci. Phila, 1899, 207. 
Nos. 438 and 439 will now stand as follows - 
438. Amizilis tzacatl (Dr LA LLAVE). 
Lrochilus tzacatl De La Luave, Registro Trimestre, II, 
1833, 48. 
Amizilis tzacatl RicHMonp, Auk, XVI, Oct. 1899, 324. 
439. Amizilis cerviniventris (GouLD), 
Amazilius cerviniventris GouLp, P. Z. S. 18 56, 150. 
Amizilis cerviniventris OBERHOLSER, Proc. Acad. Nat. Ser. 
Phila. 1899, 207. 
4580. Sayornis nigricans semiatra (ViGoRs). 
Western Black Phebe, 
