Geodephagous Coleoptera of Japan. 249 



Pterostichus (Omaseus) prolongatus; P. (Lyperus) id., 

 Morawitz. 



Morawitz, Bull. Acad. St. Petersb. v., 1862, p. 251. 



P. (Sterojms) tropidurus, Bates, Trans. Ent. Soc. Lond., 

 1873, p. 288. 



Omaseus Japonicus, Motsckulsky, Etud. Ent., 1860, 



p. 6? 

 The typical form of this species has perfectly flat 

 elytral interstices, and the elytra are elongate-oblong. 



East Siberia ; Shanghai ; Yezo. 



Var. Elytrius profundius striatis, interstitiis convexis. 



Pterostichus (Lyperus) fuligineus , Morawitz, Bull. Acad. 

 St. Petersb., v., 1862, p. 325 ; id., Beitr. z. Kaferfauna 

 Ins. Jesso, p. 52. 



Yezo, and the main island. 



A series of this variety taken by Mr. Lewis exhibits 

 various degrees of convexity of the elytral interstices. 

 Examples from Fujisan form the extremes in this 

 respect, and have the prima facie aspect of a distinct 

 species ; the elytra are relatively shorter and dilated 

 posteriorly ; but this modification is seen in Yezo speci- 

 mens of 0. prolongatus. 



The metathoracic episterna are too narrow and 

 elongated for Steropus, although the facies of the 

 insect is that of the species of Steropus allied to S. 

 orientalis. I hesitate to adopt Motschulsky's prior name 

 japonicus, as the size he gives (4^ lines) and the insuffi- 

 cient diagnosis make the identity of the species doubtful. 



Pterostichus (Omaseus) leptis. 



O. nigra affinis, sed gracilior thorace precipue an- 

 gustiori prope basin fortius sinuato-angustato, angulis 

 posticis rectis subacutis. Niger, palpis castaneo-rufis, 

 antennis tarsisque piceis ; capite punctulato, oculis pro- 

 minentibus ; thorace basi utrinque crebre ruguloso- 

 punctato, profunde foveato, bistriato, carinulaque obtusa 

 juxta angulum ; elytris profunde subpunctulato- striatis. 

 Long. 20 mm., $ , ? . 



Sapporo, Hakodate, Niigata, and Fujita. 



