Longicorn Coleoptera of Japan. 149 



that the composition of the Japanese Coleopterous fauna was 

 essentially different from that of the Palasarctic province, and 

 required to be accounted for by a different set of antecedents. 

 A similar conclusion has been arrived at long ago by Giinther 

 with regard to the Eeptilia, and by other authors ; and it is 

 interesting thus to find the various groups of the animal 

 kingdom corroborating these generalizations. 



The total number of genera of Geodephaga known from Japan 

 is 84, of Longicornia 64. The number of tropical genera in 

 both cases is 21, of genera peculiar to Japan (so far as at present 

 known) 9 and 7 respectively, genera common to Europe and 

 Japan (most of them being widely distributed temperate 

 forms) 44 and 22, characteristic or peculiar European genera 

 absent from Japan 52 and 40 (more than one half the total 

 number in each case) . In the Longicornia there are 8 genera 

 common and peculiar to Eastern or North-eastern China and 

 Japan ; in the Geodephaga there are only 2. The number of 

 Longicorn species actually identical in Japan and Europe is 

 only 4 ; but 6 others are so closely allied that they would be 

 considered by some entomologists local varieties, making the 

 total number 10. 



The general aspect of the Longicorn collection is much more 

 tropical and anti-European than that of the Geodephaga. 

 This is owing to so many of the large and striking species 

 being well-known Indo-Chinese and Malayan forms. Such 

 are Xystrocera, Neocerambyx, Pyrestes, Erythrus, Melanauster, 

 Batocera, Apriona, Olenecamptus, JElara, Glenea, and others. 

 Besides these, we find : — Ehodopis, hitherto known only 

 from Sylhet ; Distenia, a tropical and subtropical genus in both 

 hemispheres, unknown to the Europseo-Siberian and Mediter- 

 ranean faunas ; Thranius, hitherto known only from the 

 Moluccas and Ceylon ; and a few common tropical genera repre- 

 sented in Japan by numerous species, such as Ceresium, 

 Praonetha, Apomecyna, and Syhra — all totally foreign to the 

 north-temperate continental fauna. The absence of many of 

 the most familiar and characteristic European genera is equally 

 striking, such as Ceramhyx, Hylotrupes, Hesperophanes, Gra- 

 cilia, NecydaliSj Stenopte?'us } Molorchus, Parmena, Dorcadion, 

 MorimuS) Lamia, Rhagium, &c. 



Many entomologists, authorities in their respective groups, 

 are at work on other portions of Mr. Lewis's magnificent col- 

 lection ; and it is to be hoped this enterprising traveller may 

 be enabled to republish all the scattered memoirs in a collected 

 form, as a contribution to the fauna of Japan. 



Mr. Lewis's collections were made chiefly at Nagasaki, 

 Osaka, and Hiogo. 



