AYES. 451 



forwards. Claws compressed, curved. Tail long, broad, with ten 

 feathers. (All the species Africans.) 



Corythaix ILLIG., Turacus Cuv., GRAY. (Musophaga VIEILL. in 

 part.) Bill short, high, compressed; upper mandible produced at 

 the tip beyond the lower. Orbital region naked. Head armed 

 with a mobile crest. Wings with first quill short, fourth and fifth 

 subequal, fifth longest of all. 



a) With base of bill covered with recumbent plumes. 



Sp. Corythaix oJhocristatus STRICKL., Cuculus Persa GMEL. in part, BUFF. PI. 

 enl. 60 1, LESS. Ornith. PI. 79, fig. i; Cape of Good Hope, Mosambique; 

 Corythaix persa, Cuculus Persa L., EDWARDS Birds, PI. 7, Coast of 

 Guinea; Corythaix leucotis RUEPPELL, Neue Wirbelthiere zu der Fauna, 

 von Abyssinien, Tab. 3, &c. 



b) With lose of bill naked. (Nostrils in middle of bill.) 



Sp. Corythaix gigas STEPH., Turacus giganteus VIEILL., LEVAILL. Promer. el 

 Cruep. PI. 19, GUER., Iconogr., Ois. PI. 38, fig. i; Coast of Guinea; 

 Corythaix Rossce, Musophaga Rossce GOULD, JARDINE Contrib. to Ornith. 

 1851, PI. 81. 



Musophaga ISERT. Bill high, moderate, naked at the base, 

 with culmen declivous, produced above the forehead into a convex 

 disc. Orbital region naked. Nostrils towards the anterior part of 

 bill, near the margin. Wings with fourth quill longest. Tarsi 

 long. Claws curved, strong. Three toes turned forward, with outer 

 imperfectly versatile. 



Sp. Musophaga wolacea ISERT \ LATH., LESSON Ornith. PI. 79, fig. 2, 

 SWAINS. Birds of Western Africa, i. PL 19; Senegal. This genus is 

 scarcely distinct from the preceding, at least the last species referred to in 

 it (under the division b) make the transition between the two. 



Schizorhis WAGL., GRAY, Chizcerhis WAGL. previously, RUEP- 

 PELL. Bill short, with culmen gibbous, not carinate, thick ; nostrils 

 open, lunate, narrow, placed at the base of bill. Wings long, with 

 fourth, fifth, and sixth quills subequal, fourth mostly longest of all. 

 Feathers of the occiput or the nape often elongate, forming a crest. 



Sp. Schizorhis variegata WAGL., Phasianus africanus LATH., LEVAILL. Pro- 

 mer. PI. 20, SWAINS. 1. 1. PI. 20; Schizorhis zonura RUEPPELL, Neue 



1 Schriften dtr Gesellschaft naturforsch. Freunde zu Berlin, ix. Bd. s. 16 20, 

 Tab. i. 



292 



