76 Mr. O. Salvin on Birds 



Climacocercus concentricus (Less.), Cab. in Schomb. Guiana, 

 iii. p. 738. 



Bartica Grove, Camacusa. 



500. Geranospizias gracilis. 



Ischnosceles gracilis (Temm.), Cab. in Schomb. Guiana, iii. 

 p. 737. 



There are no specimens of Geranospizias in Mr. Whitely's 

 collection, so that I am unable to say whether the Guianan 

 bird belongs to G. gracilis or to G. hemidactylus, races united 

 by Mr. Sharpe under Vieillot's name carulescens (Cat. B. 

 Brit. Mus. i. p. 81). But on this point see Mr. Gurney's 

 remarks (Ibis, 1875, p. 233). 



501. Hypotriorchis femokalis. 



Hypotriorchis femoralis (Temm.), Cab. in Schomb. Guiana, 

 iii. p. 734. 



Falco fusco-C(sruIescens,Yie\\\., Sharpe, Cat. B. Brit. Mus. 

 i. p. 400. 



Roraima (3500 ft.). 



502. Hypotriorchis rufigularis. 

 Falco rufigularis, Daud. Traitd, ii. p. 131. 



Falco aurantius, Cab. in Schomb. Guiana, iii. p. 733. 

 Falco albigularis, Daud., Sharpe, Cat. B. Brit. Mus. i. p. 401. 

 Bartica Grove, Camacusa, Roraima (3500 ft.). 



503. TiNNUNUULUS ISABELLINUS. 



Falco isabellinus, Sw. An. in Menag. p. 281. 

 Cerchneis isabellina, Sharpe, Cat. B. Brit. Mus. i. p. 441. 

 Cerchneis sparverius, Cab. in Schomb. Guiana, iii. p. 734. 

 Roraima (3500 ft.). 



504. Elanoides furcatus. 



Nauclerus furcatus (Linn.), Cab. in Schomb. Guiana, iii. 

 p. 735. 



Elanoides furcatus, Sharpe, Cat. B. Brit. Mus. i. p. 317. 

 Bartica Grove. 



505. Elanus leucurus. 



Elanus leucurus (Vieill.), Cab. in Schomb. Guiana, iii. 

 p. 735; Sharpe, Cat. B. Brit. Mus. i. p. 339. 

 Roraima (3500 ft.). 



