probably arises from difference of sex. In the present bird wfe believe that the figure in the 

 back -ground represents the adult dress of the female. The specimen from which the drawing 

 was taken was obtained by Salvin dm-ing his stay at Choctum, in the month of Februaiy, 18G2, 

 and turned out to be a female on dissection. Another of the same sex, and in precisely similar 

 plumage, was brought in by an Indian on the same occasion. Unfortunately we have not quite 

 such positive information respecting the male of this species, but our front figure is taken from 

 one of the tvpe-specimens obtained by M. Boucai'd at Teotalcingo, in ]\Iarch, 1859, which is 

 marked as being of this sex, — and is, we believe, in nearly adult plumage. This specimen, 

 as well as the two former, is now in Messrs. Salvin and Godman's collection. 



If these suppositions are correct, the female of Boucard's Tinamou differs from the male in 

 having the lower back, secondaries, and wing-covei'ts strongly banded across with light yellowish 

 brown; and the markings on the wing-coverts of the male specimen figured in our plate, 

 are the remains of the mottled plumage, which would wholly disappear in the perfectly adult 

 bird. The correctness of this view is strengthened by some specimens from Vera Paz being 

 nearly destitute of markings on the wings and coverts, while others have them more strongly 

 shewn. 



Apbil, 1868. 



[92] 



