liv GEOGEAPHICAL DISTEIBUTION OF BUTTERFLIES 
occurring in North China, we have 93 species, of which 14 are Oriental, and 79 Palaearctic. 
Again, deducting the 8 Palasarctic species exhibiting Oriental affinities, we have 14 Oriental to 71 
Patearctic species, being 5 of the latter to 1 of the former. 
Species of Rhopalocera occurring in the Japanese Isles 146 
Common to both the Palaearctic and Oriental Regions 211 
Occurring in the Oriental Region or having Oriental affinities 43 I 140 
Occurring in the Palaearctic Region or having Palasaretic affinities 82 J 
Species occurring in the Patearctic Region but having Oriental affinities 18 
r Oriental 9 | 
Species occurring in North Japan (Yesso) < Palajarctic 68 I 95 
[ Common to both Regions 18 J 
I' Oriental 34 1 
Species occurring iu Central Japan (Hondo) < Palajarctic 71 I 124 
y Common to both Regions 19 J 
r Oriental 29 1 
Species occurring in South Japan (Kiushiu) < PaLxarctic 19 I 62 
I Common to both Regions 14 J 
Deducting the 18 species with Oriental affinities from the number given above as Palcearctic, 
there remain 64. 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 (North), omitting 18 species common to both Regions, the Pala;arctic species 
predominate to the extent of 15 to every 2 Oriental. 
In the main Islaud (Central) there are 34 Oriental species to 71 Palaearctic ; 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 Paloearctic to 29 Oriental species, giving a 
proportion of 3 of the latter to every 2 of the former. 
[Note. — The Island of Kiushiu has been much less worked than either of the other two 
Islands.] 
Species of Rhopalocera occurring in the Corea 114 
Common to both the Pala;arctie and Oriental Regions 18 
Occurring in the Oriental Region or having Oriental affinities 14 1- 114 
Occurring in the Paliearctic Region or having PaliBarctic affinities 8 
Occurring in the PaliEarctic Region but having Oriental affinities 11 
Deducting the 18 species common to both Regions, we have 96, of which 82 are Paltearctic or 
