FALCONID.E. 



37 



orange : the quills dusky, internally margined with 

 white at the tips ; the secondaries slightly sprinkled 

 with rust-colour, beneath white : the tail-feathers 

 ashy-black, all but the two middle ones internally 

 edged with white, beneath white : legs yellow : claws 

 black : irides hazel. 



STIRPS III.— FALCONINA. (FALCONS.) 



Rostrum breve, a bast aduncum ; alee longce ; remex seciinda 



longissima. 

 Beak short, hooked from the base ; tvings long ; the second quill 



largest. 



GENUS XXIII — IERAX, Vigors. 



Rostrum breve; mandibula 

 superior fortiter bidentata, 

 inferior simpliciter emar- 

 ginata. 



Tarsi mediocres ; acrotarsia 

 scutellata. 



Alee breves; remex secunda 

 longissima, leviter interne: 

 prope apicem emarginata. 



Beak short ; the upper man- 

 dible strongly bidentate, 

 the under simply emar- 

 ginated. 



Tarsi mediocral ; acrotarsia 

 scutellated. 



Wings short, the second quill 

 longest, slightly emargi- 

 nated internally near the 

 tip. 



Sp. I . Ie. caerulescens. 



Falco caerulescens. Shatv, v. vii. p. 208. pi. 27« — India. 



GENUS XXIV.— FALCO Auctorum. FALCON. 



Rostrum breve ; mandibula 

 superior fortiter dentata, 

 btferiore emarginata. 



Acrotarsia reticulata. 



Beak short, the upper man- 

 dible strongly dentate, the 

 under emarginate. 



Acrotarsia reticulated. 



