Geographical Distribution of Butterflies in Gt. Britain. 493 



V. The " Scottish " or Northern type contains three species : 



Polyommatus Artaxerxes. I Erebia Blandina. 

 Satyrus Davus. 



VI. The " Highland " or Mountain Type one only : 



Erebia Cassiope. 



It is remarkable that, of the last four, two only Satyrus Davus and 

 Erebia Cassiope reach Ireland, whereas all of them occur in England.* 

 When surprise is expressed at the poverty of our mountain Fauna, it 

 should be remembered that it is analogous to that of the Scandinavian, 

 not the European, Alps. 



If we proceed to institute a comparison between our butterflies 

 and flowering plants, as to the respective proportions of the several 

 "Types," we shall find there are: 



p. 6025. 



So that the greatest contrast is presented by the striking preponderance 

 of the " Germanic" and " English " Types among the insects : on the 

 other hand, the "Atlantic" element (which in plants nearly balances 

 the "Germanic") is in the butterflies quite insignificant, and the 

 " Highland" is equally small. 



The same thing becomes still more evident on adding together the 

 "Germanic" and " English " sections, as they amount to more than 

 one-half of the whole number against a quarter in plants : from which it 

 seems reasonable to conclude that our butterflies are much more 

 unequally and locally distributed than our flowering plants. That the 

 insects are also much more influenced by a warmerf temperature is plain, 

 both from the higher numbers of southern species and | because Ireland 



p. 6026, 



* Supposing the English P. Salmacis to be a mere variety of P. Artaxerxes. 

 [Printed footnote. W. F. K.] 



t and drier evidently through the numbers of the Germanic Type [?] [This 

 note also has been cut into by the binder, but appears to read as here given. 

 W. F. K.] 



