1 . PEI.KCAN US. 461 



Keji to the S/iecu's. 



I. No ring of feathers round the iialied ocular 

 space. 

 A. Base of the lower mandible entirely- 

 naked. 



a. Feathers on the forehead terminating 



in a point. 

 a'. Larger ; forehead s-wollen : tail with J onocrotalus, p. 462. 



24 feathers | sharpii, p. 4G2. 



b' . Smaller ; forehead not swollen ; tail 



with 22 feathers roseus, p. 466. 



b. Feathers on the forehead terminating 



in a concave line at the base of the 

 culmen. 

 e'. Pouch extending less than half way- 

 down the neck ; underparts white. 

 a". Larger ; wing 27-28 inches ; a 

 full crest of long, soft, pointed 

 feathers, about 4 inches in 

 length. Wings and back white 



at all seasons crispus, p. 468. 



b". Smaller; wing 22-25 inches. 



Wings white, lower back vina- 



ceous in the breeding-season ; 



wings brown, lower back white 



in the non-breeding season. 



a^. Sides of the upper mandible 



with large bluish-black spots ; 



feathers of the head, crest, and 



neck soft and curly, with black 



bases pMlippensis, p. 471. 



b^. Sides of the upper mandible 



without spots ; feathers of the 



head and neck narrow and 



straight, showing no visible 



black bases ; a full occipital 



crest of long narrow feathers. rufescens, p. 474. 



d' . Pouch extending about halfway 



down the neck ; general colour of 



underparts dark brown. Back of 



the neck dark velvety brown in 



the breeding-season : entirely white 



in the non-breeding season. 



c". Breast and belly brown, without 



or with indistinct traces of white 



shaft-strij)es ; occipital crest 



short, less than 1'5 inch. 



<?. Pouch dull greenish brown or 



olive -brown fusais, p. 470. 



d'^. Pouch red (in the breeding- 

 season) californieus, p. 478. 



d" . Breast and belly brown, with 

 well-marked white shaft-stripes ; 

 occipital crest well-developed, 

 2o inches thagus, p 480. 



