Geographical Distribution of the British Butterflies. 235 



appeared. Similar fen districts still exist in Norfolk and Suffolk; 

 but though the insect has been sought there in its most likely 

 haunts, no recent captures are known. 



Of our 25 general and common species, all have been captured 

 in Asia, except Las. /Egeria. 



]5, such as Brassicce, Rapes, JEgeria, Megcera, Janira, Pam- 

 iMliis, Urt'iccc, Atalanta, Cardui, Rubi, Phlceas, Alsus, Alexis, 

 Jgestis and Alveolus, have been met with south of the 

 Mediterranean. 



5, Atalanla, Cardui and Phlceas, occur on the other side of the 

 Atlantic. 



Cardui, indeed, in perfectly cosmopolitan, occurring all over 

 the globe. 

 Of our 25 more southern species, all but three occur in Asia; 

 viz. Tit/ionus, Adippe and Lucina. Tilhonus even disappears in 

 the eastern half of Germany. 



6, Rhamni, Edusa, Hyale, Sibylla, Belulce, and Linea, extend 

 to Africa. 



5, Rhamni, Edusa, C. Album, Sylvanus, and Comma, have been 

 noticed in America. 



Of the remaining 15 species, all occur in Asia but the Alpine 

 Cassiope and Chryseis. 



6, Machaon, Cinxia, Actceon, DapUdice, Lathonia, and Antiopa 

 occur in Africa. 



And the last-named also in America. 

 Thus 59 of our 65 species occur to the east of Russia. 



27 „ south of Mediterranean. 



9 ,, cross the Atlantic. 



1 „ is universal. 



Mr. Watson, in his " Cybele Britannica," has divided our British 

 Flora into what he terms the British, English, Germanic, Atlantic, 

 Scottish and Highland types. 



It will be seen at a glance that the first division here corre- 

 sponds to the British type of plants ; the second divis4on, the more 

 southern species, to the English type of plants ; but unless we 

 refer the three moor and mountain species to the Highland type, 

 we cannot follow the same system of classification any further. 



We have not a single Butterfly peculiar to our west coast, nor 

 a single one peculiar to the north ; the circumpolar species which 

 occur in Lapland do not reach us, neither have we any one species 

 peculiar to the eastern coast of England. We simply trace, as we 

 advance northwards, a gradual decrease and diminution of species ; 

 every one of our species occurs plentifully in southern Germany. 



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