250 ALLEN S NATURALLSTS L1J]RARV. 



Orialis oythropkra^ Ogilvie-Grant, Cat. B. Brit. Mus. xxii. 

 p. 516 (1893). 



Adult. — Easily distinguished from the two preceding species 

 by having the four outer pairs of tail-feathers widely tipped 

 with dark cJiestiiut. From O. garrula, which it otherwise 

 resembles, it may be further distinguished by having the top 

 of the head and nape brighter chestnut, and the ujider tail- 

 coverts of a paler chestnut colour. Total length, 24 inches ; 

 wing, 9-2 ; tail, io-6; tarsus, 3*1 ; middle toe and claw, 3-1. 



Range. — North-western South America ; Babahoyo, Guaya- 

 quil, and Palmal, Western Ecuador. ? Cumana, Venezuela. 



THE PIPING GUANS. GENUS PIPILE. 

 Pipile, Bonap, C. R. xHi. p. 877 (1856). 

 Type, P. cumajiensis (Jacquin). 



The width of the upper mandible greater than the height. 



Sexes similar in plumage. A well-developed crest of pointed 

 feathers. A large patch round the eyes naked. Front of the 

 neck almost naked, with a median 7vattle. 



Tail composed of tivelve feathers, rather long and rounded, 

 the outer pair being distinctly shorter than the middle pair. 



Tivo outer primary flight feat hers with the last third of the 

 inner web deeply excised. The first much shortir than the 

 second, which is about equal to the tenth ; sixth slightly the 

 longest. 



Tarsus shorter than the middle toe and claw. 



L THE WHITE-HEADED PIPING GUAN. PIPILE CUMANENSIS. 



Crax cumanensis, Jacquin, Beytr. p. 25, pi. 10 (1784). 



Crfljc /////(?, Jacquin, Beytr. p. 26, pi. 11 (1784). 



Penelope leticolophos, Merrem, Av. Icones et Descr. ii. pp. 43, 



44. pi. 12 (1786); id. Beytr. Vog. n. pp. 46, 47, pi. 12 



(1786). 



