INTRODUCTION. Ivii 



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. 



JV. Australian, or Austro- Malay an Region. 

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

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



V. Nearctic Region. 

 Greenland and North America to centre of Mexico. 



VI. Neotropical Region. 



Southern Mexico, Central and South America, West Indies, 

 &c. 



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



The Nearctic Region is only artificially separated from the 

 Pal?earctic 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 Pakearctic Region. 



Our British genera of Butterflies, with the exception of 

 Limenitis, Apatnra, Picris, Papilio, and some genera of Hes- 

 periidce 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 (Eneis and Parnassius (alpine or circumpolar), 

 Triphysa (Central Europe and Asia), Thestor, Laosopis, Zegn's, 

 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 



