2A\. ALLEN'S NATURALIST'S LIBRARY. 



Tschudi, ^Yho 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 

 Montaiias. 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^. T/drd pair of tail-feathers widely tifped zvith chest mit on both 

 2vebs; ivhite eyebroiv-stripes strongly marked and contifiued 

 backwards down the sides of the ?ieck. 



XI. THE WHITE-EYEBROWED GUAN. ORTALIS SUPERCILIARIS. 



Ortalida superciliaris, G. R. Gray, List. Gallinae Brit. Mus. 



p. ID (1867). 

 Orialis sKperciliaris, Ogilvie-Grant Cat. B. Brit. Mus. xxii. 



p. 511 (1893). 



Adult Male. — Easily distinguished from O. guttata and the 

 preceding species by the wide whitish eyebrsw-stripes, the four 

 outer pairs of tail-feathers tipped with chestnut, the third pair 

 being almost as widely tipped on both webs as the fourth. 

 Total length, 17 inches; wing, 6-8; tail, 7-2; tarsus, rS; 

 middle toe and claw, 1*8. 



Only the type specimen, a male, is known. 



Range. — South America. The exact locality is not known. 

 b. Extremities of the outer pairs of tail feathers white or buff. 



XII. THE GREY-HEADED GUAN. ORTALIS POLIOCEPHALA. 



Penelope poliocephala^ Wagler, Isis, 1830, p. 11 12. 

 Ortalida poliocephala, Wagler, Isis, 1832, p. 1227. 

 Ortalis poliocephala, Ogilvie-Grant, Cat. B. Brit. Mus. xxii. 

 p. 511 (1893). 



Adult Male and Female.- — Top of the head and neck dark grey; 



