302 



GEOGRAPHICAL ZOOLOGY. 



[PART IV. 



one-third of the total number of Passeres ; a wonderful illus- 

 tration of the Ornithological riches of South America. 



Order II.—PICAEIjE. 

 Family 51.— PICIDjE. (36 Genera, 320 Species.) 



General Distribution. 



Neotropical 

 Sob-regions. 



i .a .3 .4 



Nearctic 

 Sub-regions. 



1.2.3.4 



Pal^earcttc 

 Sub-kegions. 



1.2.3.3 



Ethiopian 

 Sub-regions. 



Oriental 

 Sub- regions. 



Australian 

 Sub-regions. 



1.2.3 — 11.2.3.4 1 



The Woodpeckers are very widely distributed, being only absent 

 from the Australian region beyond Celebes and Elores. They 

 are most abundant in the Neotropical and Oriental regions, both 

 of which possess a number of peculiar genera ; while the other 

 regions possess few or no peculiar forms, even the Ethiopian 

 region having only three genera not found elsewhere. The soft- 

 tailed Picumninse inhabit the tropical regions only, Picumnus 

 being Neotropical, Vivia and Sasia Oriental, and Verrcauxia 

 Ethiopian. Picoides, or Apternus, is an Arctic form peculiar to 

 the Nearctic and Palsearctic regions. Celeus, Chrysoptilus, Chloro- 

 nerpes, and some smaller genera, are Neotropical exclusively, 

 and there are two peculiar forms in Cuba. Yungipicus, Chryso- 

 colaptes, Hemicercus, Mulleripicus, Brachyptcrnus, Tiga, and 

 Micropternus, are the most important of the peculiar Oriental 

 genera. Dcndropicus and Geocolaptes are Ethiopian ; but there 

 are no woodpeckers in Madagascar. The Palsearctic woodpeckers 

 belong to the genera Picus — which is widely distributed, Gecinus 

 — which is an Oriental form, and Dryocopus — which is South 

 American. Except Picoides, the Nearctic woodpeckers are mostly 

 of Neotropical genera; but Sphyrapicus andHylatomus are peculiar. 

 The geological record is, as yet, almost silent as to this family ; 

 but remains doubtfully referred to it have been found in the 

 Miocene of Europe and the Eocene of the United States. Yet 

 the group is evidently one of very high antiquity, as is shown by 



