244 LLOYD’S NATURAL HISTORY. 
Tschudi, who met with this species in Peru, gives the fol- 
lowing note regarding its habits :—“ This species lives in flocks 
in the more thinly-wooded parts of most of the Peruvian 
Montafias. The Indians call it ‘Haccha-Nualpa’ (Woodcock). 
After sunset a number of these birds will collect for the night 
on a large tree and give vent to a piercing shrieking cry, which 
is fairly expressed by the syllables ‘Ven-aca.’ Before sunrise 
this cry is repeated, and the flock disperses for the day.” 
d?. Third pair of tatl-feathers widely tipped with chestnut on both 
webs, white eyebrow-stripes strongly marked and continued 
backwards down the sides of the neck. 
XI. THE WHITE-EYEBROWED GUAN. ORTALIS SUPERCILIARIS. 
Ortalida supercittaris, G. R. Gray, List. Gallinze Brit. Mus. 
p. 10 (1867). 
Ortalis superciliaris, Ogilvie-Grant Cat. B. Brit. Mus. xxii. 
Pp: 511 (1893). 
Adult Male—Easily distinguished from O. gutfafa and the 
preceding species by the wzde whitish eyebrow-stripes, the four 
outer pairs of tail-feathers tipped with chestnut, the ¢i7zvd pair 
being almost as widely tipped on both webs as the fourth. 
Total length, 17 inches; wing, 6°8; tail, 7:2; tarsus, 1°8; 
middle toe and claw, 1°8. 
Only the type specimen, a male, is known. 
Range.---South America. The exact locality is not known. 
b. Lixtremities of the outer pairs of tail-feathers white or buff. 
XII. THE GREY-HEADED GUAN. ORTALIS POLIOCEPHALA. 
Penelope poliocephala, Wagler, Isis, 1830, p. 1112. 
Ortalida poliocephala, Wagler, Isis, 1832, p. 1227. 
Ortalis poltocephata, Ogilvie-Grant, Cat. B. Brit. Mus. xxii. 
Pp. 511 (1893). 
Adult Male and Female.—Top of the head and neck dark grey; 
