SCAKSOUES. 249 



Tongue with a simple margin. 

 Base of the bill with a cere. 



138. PSITTACUS. Parrot. The bill in this genus is 

 more solid than in the Toucans. The tongue is fleshy, and 

 rounded. The species are numerous, and are all the in- 

 habitants of warm countries. 



Base of the bill without a cere. 



139. SCYTHROPS. Bill channelled at the side. S. psit- 

 tacus. 



140. MALCOHA. Bill plain, rounded at the base. 



b. Bill of the ordinary size. 

 Gape wide. 



141. CENTROPUS. Claw of the hind toe much produced. 

 Cuculus Mgyptiacus. 



142. CUCULUS. Cuckoo. C. canorus. The species of 

 this genus may be subdivided by the number of feathers in 

 the tail, the form of the nostrils, and the curvature of the 



beak. 



Gape narrow. Tongue long. 



143. Picus. Woodpecker. Bill angular at the base, 

 and wedge-shaped at the tip. Tongue with reversed 

 bristles. Tail feathers rigid. P. martins. 



144. YUNX. Wryneck. Bill rounded, pointed. Tongue 

 smooth. F. torquilla. 



(2.) Anterior toes connected. 

 Anterior toes adhering. 



145. GALBULA. Bill produced, feet short. G. viridis. 



Toes united by a membrane. Bill short, and inflated 

 above. 



146. MUSOPHAGA. Bill ascending on the forehead. M, 

 violacea. 



