ON THE LONSICOEN BEETLES OE JAPAN. 205 



Loagicorn Beetles of Japan. Additions, cliiefly from the later 

 Collections of Mr. George Lewis ; and Notes on the Syno- 

 nymy, Distribution, and Habits of the previously known 

 Species. By H. W. Bates, F.R.S., F.L.S. 



(Read 5th June, 1884.) 



[Plates I. & II.] 



The present paper is essentially a supplement only to a former 

 paper published on the same subject in the ' Annals and Magazine 

 of Natural History' for 1873, vol. xii. ; but ifc is a supplement 

 which in extent greatly surpasses the original, the number of 

 species of this conspicuous Coleopterous family recorded in the 

 first paper beingl07, and the present paper containing 129, making 

 a total of 236 species now known as belonging to the Japanese 

 Fauna in this department. This great accession to our knowledge 

 is due almost entirely to the labours of Mr. Lewis and the native 

 collectors directed by him, on his second visit to the islands in 

 1880-81. It is sufficient to glance at the two lists — the original 

 one, published in 1873, and the following supplemental one — to 

 see how large a proportion of the new species (and ifc is the same 

 with the species known elsewhere now detected in Japan) is due 

 to the labours of Mi\ Lewis. 



In the introductory paragraphs to my former paper I made a 

 few remarks on the relations of the Fauna o£ Japan as regards 

 the Lougicornia to those of other regions, pointing out chiefly 

 the very strong tropical element and the absence of many charac- 

 teristic palsearctic genera. I have also discussed the question of 

 faunistic relations in two other papers published on the Geode- 

 phagous Coleoptera of Japan. In my first enumeration of the 

 Japanese Longicornia, I remarked that 21 genera out of the 

 total of 64) were tropical genera, i. e. genera found nowhere but 

 within the tropics. In the present supplement only 6 of the 57 

 genera added to the original 64 are known as tropical ; but 

 the number must be increased if we are to add the many abso- 

 lutely new genera (such as Leptoxenus, PyrrJiona, Corennys, Xeni- 

 cotela, &c.), which have tropical, and not palaearctic, affinities. 

 Still, upon the whole, our supplementary list must be considered 

 as diminishing the proportion of tropical forms in the Longicorn 

 Fauna of Japan, a large number of European, Siberian, and North- 



LINN. JOUBN. — ZOOLOGY, YOL. XYIII. 15 



