248 Mr. H. W. Bates' supplement to the 



The metathoracic episterna are rather longer and 

 narrower than they are in the restricted genus Ptero- 

 stichus or in Steropus. They are nearly of the same shape 

 as in Omaseus, but the general form and facies of the 

 species do not agree with that group. 



Pterostichus sejunctus. 



P. Thunbergi simillimus, differt tantum thoracis angulis 

 posticis acutis productis, margine ante angulum breviter 

 sinuato ; sternis ventrisque basi utrinque plus minusve 

 punctatis. Long. 15 mm., <? , 2 . 



Yezo. 



Distinguishable from P. Thunbergi only b}' the pro- 

 minent and acute posterior angles of the thorax; but 

 specimens of P. Thunbergi occur in which the angles 

 have a slight projection. The punctuation of the sides 

 of the sternum and basal segments of the abdomen is 

 also not quite constant ; though generally smooth in P. 

 Thunbergi, examples occur in which they present nu- 

 merous punctures. 



Pterostichus (Omaseus ?) defossus. 



Platysmce oblongopunctatce prima facie similis, sed 

 differt thoracis angulis rotundatis metathoracisque epi- 

 sternis parum elongatis, &c. Niger supra plus minusve 

 olivaceo-senescens, antennis palpis pedibusque piceis ; 

 oculis sat prominentibus, fronte punctulata; thorace 

 paullo ante medium valde rotundato, postice subrecte 

 angustato, angulis posticis rotundatis, foveis basalibus 

 utrinque duabus profundis et grosse punctatis, interiori 

 longiori et profundiori ; elytris oblongo-ovatis, margine 

 basali utrinque valde arcuato, apice oblique modice 

 sinuatis, sat profunde striatis (stria 7ma apice excepta 

 obsoleta) striola scutellari modice elongata, interstitiis 

 convexis, tertio 2 — 3 punctato ; tarsis 4 posticis gracili- 

 bus, bisulcatis ; sternis lateraliter modice punctatis, 

 metathoracis episternis fere sicut in Omaseo modice 

 elongatis. 



$ . Segmentum ultimum ventrale simplex. Long. 

 8|— 10 mm., $ , ? . 



Nikko. 



