Geodephagous Cohoptera of Japan. 247 



$ . Segmentum ultmium ventrale transverse profunde 

 excavatum, margine apicali medio late sinuatum angnlis 

 valde lobatis, lobis cornua recur va sirnulantibus. Long. 

 15 mm., $ , ? . 



Awomori. 



The apical ventral segment of the male is quite as 

 extraordinary in form as in P. asymmetricus, hut is 

 symmetrical. Instead of a central subbifid lobe, the 

 apical margin is broadly sinuated in the middle, with 

 each of the external angles produced into a horn-like 

 process, which curve upwards towards the tips of the 

 elytra, and are visible from above. 



Pterosticlius (Omaseus /) polygenus. 



Parvus, nigro-piceus, antennis palpis pedibusque 

 castaneo-rufis ; oculis prominentibus ; thorace sub- 

 cordato-quadrato, paullo ante medium sat rotundato 

 postice paullo magis quam antice (et subrecte) angustato, 

 angulis anticis parum productis, posticis dentiformiter 

 prominentibus, margine laterali sat acute refiexo, intus 

 sulculo angusto a disco separate, basi utrinque striis 

 duabus profundis grossissime punctatis et carinula lEevi 

 prope angulum ; elytris oblongo-ovatis, margine basali 

 sat recto ad humerum denticulato, apice conjunctim sat 

 acute prolongatis, profunde punctato-striatis striola 

 scutellari brevissima (interdum obsoleta), inter stitio 

 tertio bipunctato ; sternis utrinque (mesosternique pe- 

 dunculo) grosse punctatis; metathoracis episternis ut in 

 Omaseis sat brevibus postice angustatis ; tarsis 4 posticis 

 lateraliter tenuiter sulcatis ; prosterni processu apice 

 indistincte marginato. Long. 8 mm., $ , ? . 



Nikko. 



Closely allied to P. (Omaceus) ihorectes, differing only 

 in the thorax being much shorter, less regularly arcuated 

 on the sides, and with a much narrower groove between 

 the reflexed lateral margins and the disk. The two species 

 form a distinct group closely allied to P. (Lagarus) 

 nimbatus and Solskyi. 



Pterostichus Tlmnbergi, Morawitz. 



Morawitz, Bull. Acad. St. Petersb., v., 1863, p. 328 ; 

 Bates, Trans. Ent. Soc. Lond., 1873, p. 289. 



Yezo. 



