354 Mr. G. Lewis on new Japanese Ooleoptera. 



LVIII. — On new Japanese Coleoptera (Silphid^)*. 

 By G. Lewis, F.L.S. 



In 1881 1 liad about thirty beetles given to me by Mr. Snow, 

 who had, in an interval of seal-shooting, gathered them a 

 short time before on the sea-beach of Ketoi, one of the 

 smaller islands of the Kurile group. There were four or 

 five specimens of Nehria Snowi, Bates, a few examples of 

 Geotrujyes Icevistriatus, Motsch., some Curculionidaj, and the 

 rest of the specimens belong to the genus Lyrosoma. The 

 last are now described here, together with two species in the 

 allied genera Pteroloma and PeJates taken by myself on the 

 main island of Japan. The fauna of the Kurile Islands is 

 doubtless a very limited one ; but the discovery of four 

 species of Lyrosoma amongst so few specimens shows it to 

 be one of a very peculiar character. 



List of Species. 



Lyrosoma triparlitiim. Lyrosoma OTipenne. 

 — — Snowi. Pteroloma discicolle. 

 suturale. Pelates striatipennis. 



Lyrosoma tripartitnm^ sp. n. 



Rufo-brunneum, subopacum ; autennis pedibusqiie concoloribus ; 



capita inter oculos earinato. 

 L. 6|-7 mill. 



Keddish brown^ elytra somewhat darker ; the head, area 

 before the eyes and the epistoma are flat and on the same 

 plane, posterior limit of this area semicircular in outline ; 

 between the epistoma and the head is a distinct suture, which 

 is joined to a longitudinal carina between the eyes, thus 

 dividing the upper surface of the head into three parts, 

 surface of head somewhat opaque, owing to a very fine 

 sculpture ; the thorax widest before the middle, and from the 

 middle narrowed to the hind angles, angles a little obtuse, 

 behind the neck is a rather wide median impression, surface 

 microscopically sculptured, uneven, with a few irregular and 

 ill-defined punctures ; the scutellum triangular, very minutely 

 and transversely rugose ; the elytra margined laterally, 

 marc'in and first stria leave a rather wide interstice from 



o 



* For the first part of the " Silphidfe of Japan " see Anu. & Mag. 

 Nat. Hist. 1887, xx. p. 338. 



