1888.] MR. H. W. BATES ON COLEOPTERA FROM KOREA. 367 



c.p. Capsule of gland, c.i. Connective tissue, df. Dorsal fin. d.s. Dorsal 

 spine, ep. Epidermis, gl. Poison-gland, gr. Groove in spine, m. Opercular 

 muscles, o/). Opercular bone. op.m. Opercular membrane, op.s. Opercular 

 spine, pg. Pigment-layer of skin. r. Outer ridge of opercular spine, ah. 

 Sheath of opercular spine, x. Region at which the cells of the epidermis 

 are continuous with those of the gland, y. Space between the opercular spine 

 and its sheath. 



2. On a Collection of Coleoptera from Korea (Tribes Geo- 

 dephaga, Lamellicornia, and Longicornia), made by 

 Mr. J. H. Leech, F.Z.S. By H. W. Bates, F.R.S., 

 F.Z.S., &c. 



[Received June 5, 1888.] 



During his recent entomological exploration of Japan and the 

 neighbouring coasts of Eastern Asia, Mr. J. H. Leech paid a visit of 

 six weeks' duration (May-June 1886) to the eastern side of the 

 Korean peninsula, and was enabled, though his attention was chiefly 

 occupied with Lepidoptera, to obtain a considerable collection of 

 Coleopterous insects. His excursions were limited to the hilly 

 country in the neighbourhood of Gensan, a district which appears 

 never before to have been visited by an entomologist. Our know- 

 ledge of the products of Korea in this branch was previously con- 

 fined to the western side of the country, where a small collection was 

 made in 1883 and 1884 by Dr. C. Gottsche, and another, somewhat 

 more extensive, a little later, by Herr Otto Henz. The former was 

 catalogued and described by Herr Kolbe in Wiegniann's ' Archiv 

 fiir Naturgesch.' in 1886 ; the latter by Ganglbauer in ' Horee Soc. 

 Entom. Eossicse,' vol. xx. (1886), and by Von Heydeii in the same 

 periodical, vol. xxi. (1887). To the number of species thus recorded, 

 viz. 286, Mr. Leech, in the three groups here catalogued, has added 

 about 60, making a total of 346, which is, of course, but a small 

 fraction of the Coleopterous fauna of the country. It is welcome, 

 however, as affording us for the first time a glimpse of the nature 

 of the famia and of its relations to those of Japan and the regions 

 of continental Asia to the north and south. So far as it goes 

 it points to an essential unity of the Coleopterous fauna with 

 those of the Amur and Northern China, and at the same time a 

 decided difference between the faunas of Korea and Japan, in the 

 same Order of Insects. The difference is twofold — it consists, first, 

 in a large proportion ^ of continental Palaearctic genera and species 

 being found in Korea but not in Japan ; and, secondly, in the mix- 

 ture of tropical forms, which is so well known a feature of temperate 

 latitudes in Eastern Asia, being of a different nature in the two 

 countries, for the proportion of these forms is decidedly less in Korea 

 than in Japan, and consists of different genera as well as species. 



1 Of the 100 Korean species here catalogued, no fewer than 42 appear not to 

 be found in Japan. Four of the 42 are tropical, not properly Paltearctic, 

 forma. 



