FALCONID^. 



35 



Tarsi mediocres ; acrotarsia Tarsi mediocral ; acrotarsia 



scutellata. scutellated. 



jRemiges tertia et quarta Wings with the third and 



longissimas, sequales. fourth quills longest, equal. 



Sp. 1. Ha. bidentatus. 



Falco bidentatus. Shavo, v. vii. 175. Temm. PL Col. 38, 

 228 j jun. — Cayenne. 

 Sp. 2. Ha. diodon. Vigois. 



Ha. schistaceo-niger, nucha genis lateribiisque colli saturate cine- 



reisj suhtus cinereus ; Jemoribus rufis, - 

 Slaty-black Harpagus beneath ash, with the nape^ cheeks, and 



sides of the neck deep ash ; the thighs red. 

 Falco diodon. Temm. PL Col. 198. 



Inhabits Brazil : length about eleven inches : the 

 adult male has the head, the back, and the wings of 

 a slaty black : the nape, the cheeks, and the sides of 

 the neck deep ash : all the under parts bright ash : the 

 throat and the under tail-coverts white : the smaller 

 under wing-coverts and the feathers of the thighs are 

 bright red : the tail and the wings are striped above 

 with black and ash-colour ; and beneath with whitish 

 and black : the quills are indistinctly barred with brown 

 and black : when the scapulary feathers are elevated, 

 two large white spots become visible, which are hidden 

 by the dusky tips of the feathers when they are de- 

 pressed : the beak is horn-colour : the irides yellow : 

 the legs azure. The young male has all the upper 

 part of the plumage of a deep brown, with the edges 

 of the feathers paler : the cheeks longitudinally spotted 

 with brown and bright red : all the under parts are 

 whitish, dashed with dusky-brown : the thighs are 

 reddish. The female differs but little from the male : 



