*266. 
266a. 
Head 
166 
Wing ad. 206, tail 153 mm. ; above slaty 
grey, head darker and wings browner ; tail 
dark brown, with narrow bands of greyish 
white ; below pale grey, the throat and 
under tail-coverts white; thighs bright 
ferruginous. 
Harpagus bidentatus bidentatus (Lath.), Ind. 
Orn., i., p. 38, 1790. [Cayenne.] 
Double-toothed Hawk. 
Size similar; wing 2 200 mm.; above 
[oldest dress] much darker, slaty black ; 
tail with 2 brownish white bands ; throat 
white, with median black streak ; upper 
chest greyish, below banded with grey and 
white ; less old birds have tail browner, with 
3 narrow whitish bands and another across 
upper tail-coverts ; below chestnut rufous, 
irregularly barred, except on chest, with 
whitish and indistinct darker bars. 
Harpagus bidentatus fasciatus Lawr., Pr. 
Phil. Acad., 1868, p. 429 (1869). [Guate- 
mala. | 
Slightly larger, wing ad. 223 mm.; above 
browner ; below banded as in less old 
stage of last form. 
Guiana, 
Trinidad. 
Venezuela, 
Colombia, Peru 
E. Bolivia, and 
W. Matto 
Grosso. 
Central America 
(S. Mexico and 
Guatemala to 
Panama). 
Gen. LXXXIV. BAZA Hodgs. (Jan. 1837). 
Type by orig. desig. B. syama Hodgs. = Falco leuphotes Dumont. 
with long occipital crest ; loral feathers 
very compact; bill with 2 teeth (sometimes 
appearing as serrations); nostrils linear ovals, 
without tubercles ; 2 outer primaries with inner 
webs sinuated ; size very small. 
