liv 
GEOGRAPHICAL DISTRIBUTION OF BUTTERFLIES 
occurring in North China, we have 93 species, of which 14 are Oriental, and 79 Pala^arctic. 
Again, deducting the 8 Palsearctic species exhibiting Oriental affinities, we have 14 Oriental to 71 
Palaearctic species, being 5 of the latter to 1 of the former. 
Species of Rhopalocera occurring in the Japanese Isles 14G 
Common to both the Pah^aretic and Oriental Regions 21 
Occurring in the Oriental Region or having Oriental affinities 43 !> 140 
Occurring in the Pahtvirctic Region or having Pala}arctic affinities 82 
Species occurring in the Patearctic Region but having Oriental affinities 18 
r Oriental 9 
Species occurring in Xortli Japan (Yesso) < Palaearctic GS y 95 
[ Common to both Regions 18 
f Oriental 34 
Species occurring in Central Japan (Hondo) < Palajarctic 71 124 
[ Common to both Regions 19 
I Oriental 29 
Species occurring in South Japan (Kiushiu) < Pala;arctic Id [ 02 
[ Common to bo'th Regions 14 
Deducting the 18 species with Oriental affinities from the number given above as Palffiarctic, 
there remain 04. The species occurring in the Oriental Region or with Oriental affinities number 
43, excluding 21 which are common to both Regions. The proportion therefore of Paliearctic to 
Oriental species is 3 to 2. 
In Yesso (JS^orth), omitting 18 species common to both Regions, the Palaearctic species 
predominate to the extent of 15 to every 2 Oriental. 
In the main Island (Central) there are 34 Oriental species to 71 Palcearctic ; omitting 19 
common to both Regions, we find there are rather over 2 of the latter to each 1 of the former. 
In the Island of Kiushiu (South) there are 19 Palajarctic to 29 Oriental species, giving a 
proportion of 3 of the latter to every 2 of the former. 
INote.—Thc Island of Kiushiu has been much less worked than eitlier of the other two 
Islands.] 
Species of Rhopalocera occurring in the Coi-ea 114 
Common to both tlic Palajarctic and Oriental Regions J,S | 
Occurring in the Oriental Region or having Oriental affinities 14 1 114 
Occurring in the I'aliearclic Region or liaving I'alajarctic affinities 8 J 
Occurring in the Palaearctic Region but having Oriental aOinilies 11 
Ucductiug the 18 species common to both Regions, we have 9(5, of which 82 are Pala-arctie or 
