FALCONIDJE. 35 



Tarsi mediocres ; acrotarsia 



scutellata. 

 Remiges tertia et quarta 



longissimse, aequales. 



Tarsi mediocral ; acrotarsia 



scutellated. 

 Wings with the third and 

 fourth quills longest, equal. 



Sp. 1. Ha. bidentatus. 



Falco bidentatus. Shaiv, v. vii. 175. Temm. PI. Col. 38, 

 228 ; jun. — Cayenne. 

 ■'■- Sp. 2. Ha. diodon. Vigors. 

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



reis, subtus 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. PI. Col. 1 98. 



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 : 



