May, 18730 277 



On the PECTINICORN COLEOPTERA OF JAPAN, with DESCRIPTIONS 

 OF THREE NEW SPECIES. 



BT CHAS. O. WATEEHOTJSE. 



The following species have already been recorded from Japan : — 

 Litcanus maculifemoratus, Motsch., Cladognathus inclinatus, Motsch., 

 Clad. Motschidshyi, C. "Waterh., Eurytrachelus platymelus, Saund., 

 Macrodorcas niponensis, VoU. (M. rectus and M. rugipennls,? Mots.), 

 M. crihellatus, Motsch., M. striatipennis, Motsch., M. opacus, C. Waterh. 



To these must be added the following new species of ^yus, of 

 which several specimens were brought from Japan by Mr. G-. Lewis. 



^GUS STJBNITIDUS, Sp. nOV. 



^ (var. minor ?). Niger, suhiiitidus, suh-depressus, mandibulis 

 arcuatis, cylindricis, ad basin dente acufo ahrupte armatis ; capite fere 

 ut in j3S. IcBvicoUe ; thorace iiitido, supra parcius (Jatera versus dense et 

 fortiter) punctato ; elytris nitidis, fortiter crenato-striatis, interstitiis 3, 

 5, 7 sat dense pitnctatis, suturd interstitiisque 1, 2, 4, 6 parcius et sub- 

 tiliter punctulatis ; later ibus dense et fortiter punctatis. 



Long, cum mandib. 8 lin. 



Closely allied to M. Formoscd, Bates, but distinguished by the lesser 

 punctuation (when comparing specimens of about the same size), and 

 cylindrical mandibles, which are not gradually dilated into a triangular 

 tooth at the base, but have an abrupt, sharp tooth. 



I can find no satisfactory character whereby to distinguish the 

 $ from that of u3S. Icevicollis. 



The two following species of Figulus also appear to be unde- 

 scribed : 



Figulus binodulus, sp. nov. 



Elongate, parallel, slightly convex, black. Head slightly concave above ; an- 

 terior margin nearly straight, gently emarginate at the base of each mandible ; the 

 clypeus obtusely bidentate. The side of the head between the outer base of the 

 mandible and the canthus of the eye is in the direction of an angle of 45° with the 

 anterior margin, and is slightly emarginate ; canthus rounded, depressed ; the head 

 broadest in a line with the front of the eyes, contracted behind ; the upper surface 

 with a few punctures on the forehead, moderately closely and strongly punctured on 

 the canthus and about the eyes. The mandibles are short and strong, when closed 

 they interlock for about half their length. Thorax a little broader than long, rather 

 broader than the head, the sides parallel, anteriorly cut out to receive the head, the 

 anterior angles rather prominent and rounded, the posterior angle broadly rounded ; 

 the siu'face impunctate, with the exception of a strongly punctured furrow in the 

 middle, and some irregular larger punctures towards the sides, the sides very deli- 

 cately and sparingly punctured ; the anterior margin is furnished in the middle with 



