Vol. xxxix.] 22 
The type, which is in the British Museum, was collected 
by P. O. Simons at Amotape, Peru, on the 22nd of July, 
1899. 
Gampsonyx swainsonii leone, subsp. nov. 
Gampsonyx swainsoni Salvin & Godman, Biol. Centr.- 
Amer. iii. 1901, p. 98. 
Adult male. Most nearly allied to G. s. swainsonii, but 
differs in having the upper surface darker and more strongly 
shaded with slate-grey and in having the forehead and sides 
of the face straw-colour, instead of orange-buff. 
Total length 230 mm., culmen from edge of cere 13, 
wing 58, tail 95, tarsus 27, middle toe and claw 26. 
Habitat. Leon, Nicaragua. 
The type, which is in the British Museum, was collected 
by W. B. Richardson at Leon, Nicaragua, in December 
1892 (Salvin-Godman Collection). 
Falco rufigularis petoensis, subsp. nov. 
Adult male. Differs from topo-typical F. r. rufigularis 
in being slate-colour on the top of the head, back, median and 
greater upper wing-coverts, scapulars, and upper tail-coverts, 
with black shaft-lines to the feathers, instead of black with 
slightly paler margins to the feathers ; bend of wing white 
varied with buff ; breast and sides of body blackish brown, 
instead of deep black, and the white bars broader. | 
Total length 225 mm., culmen from cere 11, wing 189, 
tail 86, tarsus 37. 
Adult female. Similar in plumage to the adult male 
described, but differing in its larger size. Wing 215 mm., 
tail 110. 
Habitat. Peto, Yucatan. 
The male and female types, which are in the British 
Museum, were collected at Peto, Yucatan, in April 1888, 
by G. F. Gaumer (Salvin-Godman Collection). 
Falco rufigularis pax, subsp. nov. 
Adult male, Differs from typical F. r. rufigularis on the 
