INTRODUCTION. lvii 



II Ethiopian Region. 

 Africa, south of the Sahara, and the adjacent islands. 



///. Indian, or Indo- Malayan Region. 

 India, south of the Himalayas, South China, the Malay Penin- 

 sula, and the Philippines, Formosa, Ceylon, Borneo, Java, 

 Sumatra, &c. 



IV. Australian, or Austro-Malayan Region. 

 Celehes (?), the Moluccas, Papua and the Papuan Islands, 

 Australia, Tasmania, New Zealand, and the Pacific Islands. 



V. Ne arctic Region. 

 Greenland and North America to centre of Mexico. 



VI. Neotropical Region. 

 Southern Mexico, Central and South America, West Indies, 

 &c. 



I. PAL^ARCTIC REGION AND V. NEARCTIC REGION. 



The Nearctic Region is only artificially separated from the 

 Palrearctic Region and presents no feature of importance 

 beyond the presence of a few stragglers from the Neotropical 

 Fauna, and it should be united to the Palrearctic Region. 



Our British genera of Butterflies, with the exception of 

 I.iinenitis, Apatura, Picris, Papilio, and some genera of Hes- 

 periidec extend little, if at all, beyond the limits of this united 

 region. Among other characteristic genera which are not 

 British, but are likewise almost exclusively confined within its 

 limits, are CEneis and Parnassius (alpine oi» circumpolar). 

 Triphysa (Central Europe and Asia), Thestor, Iceosopis, Zeg/is, 

 Hypermnestra, Doritis, and Thais (South Europe or Western 

 Asia), Mesapia (Himalayas), and Sericinus (North China). 



In Europe the Alpine ranges from the Balkans to the 

 Pyrenees are richest in species, about 200 of the 300 European 



