1919-] Ecuadur, Peru, Bolivia, (tnd Argentina. 2<S7 



Harpagus bidentatus, 



Fatcu bideitiatas Lath. Ind. Oru. i. 1780, p. 38 : *" Cayaua." 



Harpoyas Indeittatits Hartert, Nov. Zool. v. 1898, p. 502 : 

 Chirabo, Ecuador, 1000 ft. 



No. 492. c? imiii. jNIirador, Banos, Ecuador, 1800 metres, 

 1 Feb. 1890. '' Gavalori.'' 



There are tweiity-eiglit ^kius of this species in the Hritisli 

 Museum from various localities. Eight from Britisli Guiana 

 and Trinidad, five of which are immature, have the wing- 

 measurements 195 to 210 mm. Three from Venezuela and 

 one from Bogota measure 204' to 229 mm. The bird from 

 Bogota is rather [jaler slate-grey above than any of the 

 others in the series; the under snrface deeper ciiestnut 

 which extends up the throat on each side of the central grey 

 streak ; the lesser under wing-coverts and axillaries are also 

 chestnut, but paler than the under surface. Four examples 

 from eastern Ecuador iiave a wing-measurement 210 to 

 217 mm.; two of these are immature and appear to go 

 through a different phase of plumage on the under surface 

 from anv of the other young birds, being orange-buff instead 

 of cream-white. From eastern Peru and the Amazon Valley 

 there are six birds which are all in the fully adult plumage, 

 and the wings measure 190 to 227 mm. Six fi-om Baliia 

 and Rio de Janeiro, three beinu- in immature plumage, have 

 the wiuff-measiirement 189 to 225 mm. ; from the two 

 last-named localities the birds are somewhat darker above 

 than those from Ecuador. 



Ganipsonyx swainsonii swainsonii. 



1 have compared the three specimens collected by Simons 

 and one collected at Guayaquil by Capt. Kellett and 

 Lieut. Wood Avith seventeen others in the British ,M useum 

 from Bahia, which is the type-locality of G. s. swainsonii, 

 Matlo Grosso, eastern Peru, Venezuela, Trinidad, British 

 Guiana, and Obidos on the Lower Amazon. They are very 

 similar in the colour of the plumage, except that No. 1096 

 is pale fulvous on the breast, abdomen, and under tail- 

 coverts, which is unlike any of the other specimens in the 



