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. 



*266. Harpagus bideniatus bidentatus (Lath.), Ind. 

 Orn., i., p. 38, 1790. [Cayenne.'] 

 Double-toothed "Hawk. 



Size similar ; wing ? 200 mm. ; above 

 [oldest dress] much darker, slaty black ; 

 tail with 2 brownish white bands ; throat 

 white, with median black streak ; upper 

 chest grejdsh, 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. 



Guiana, 

 Trinidad. 

 Venezuela, 

 Colombia, Peru, 

 E. Bolivia, and 

 W. Matto 

 Grosso. 



266a. Harpagus bidentatus fasciatus Lawr., Pr. 

 Phil. Acad., 1868, p. 429 (1869). [Guate- 

 mala.] 



Shghtly larger, wing ad. 223 mm. ; above 

 browner ; below banded as in less old 

 stage of last form. 



Central America 

 (S. Mexico and 

 Guatemala to 

 Panama). 



Gen. LXXXIV. BAZA Hodgs. (Jan. 1837). 

 Type by orig. desig. B. syama Hodgs. =Falco letiphotes Dumont. 



Head 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. 



