288 Mr. C. Chubb on Birds from [Ibis, 



series examined. These four birds have the range of wing- 

 measureuieuts from J 73 to 177 ram. and the tail 102 to 

 105 mm., and the seventeen specimens from other localities 

 have the range of wing-measurements from 145 to 164 mm. 

 and the tail 81 to 96 mm. I am of opinion, therefore, that 

 the most western birds should be separated subspeciHcally. 



The following synonymy is referable to Gumpsony.r 

 sivainsonii Vigors : — 



Gampsunyx swainsunii Vigors, Zool. Journ. ii. April 1825, 

 p. 69 : Interior of Bahia. 



Nertus niffrons Boie. Isis. 1828, p. '314: ex Wied. 



Fuico rujij'runs Wied, Beitr. Orn. Bras. iii. 1831, p. 123 : 

 River Mucuri, S.V^. Brazil. 



Elauiis torqnabis Less. Traite d'Orn. 1831, p. 72: Brazil. 



Gampsoiiy.i' swainsoni Scl. & Salv. P. Z. S. 1867, p. 979: 

 Pebas, E. Peru; Tacz. Orn. Per. i. 1884, p. 110, i)art : 

 Pebas. 



Gampsonyx swainsonii magnus. 



Guitipsonyx s-wainsoni ( iiec Vig.) Tacz. Orn. Per. i. 1884, 

 p. 140, part : Tumbez. 



Gampsunyx sioa'insoiii'i iti(i(jnns Chubb, Bull. Brit. Orn. 

 Club, xxxix. 1918, p. 21. 



Adult male. Similar to G. s. sivainsonu, and differing 

 only in the larger wing and tail measurements. " Iris 

 yellow; feet yellow; bill black" [P. (). Siinuns). Total 

 length 245 mm., culmen from edge of cere 14, wing 177, 

 tail 104, tarsus 32, middle toe and claw 32. 



Adult female. Similar to the adult male. Wing 176 mm., 

 tail 105. 



Hahitut. Western Peru and western Ecuador. 



The type, which is in the British Museum, was collected 

 by P. O. Simons at Amotape, Peru, on 22 July, 1899. 



No. 43. ? adult. Puna Island, Ecuador, 5 Nov. 1898. 



No. 1027. (S atlidt. Amotape, Peru, 50 metres, 22 July, 

 1899. 



No. 1096. c? imm. Piura, Peru, 50 metres, 5 Aug. 1899. 



