npw Species of IIisterida3. 343 



This is the third species known with a deep marginal stria 

 or furrow in the mesosternum. 



Hdb. Tongking (A. Weiss, 1901). Two examples in the 

 Museum of Paris and one in my own collection. 



■Plcesi 



us asperiinargo, sp, n. 



Oblongus, subconvexiis, nigcr, nitidus ; fronts trausversim punctata, 

 stria obsoleta ; pronoto lateribus eonspicue rugoso-punctato ; 

 elytris striis dorsalibus, 1 Integra, 2 striato-punctata ; propygidio 

 utrinque grosse, in medio minor, punetato ; prosterno bistriato, 

 lobo grosse et profunde punetato. 



L. 11 mill. 



This species differs from P. Mouhoti^ Lew., in being more 

 oblong and less convex, and the sculpture of the lateral 

 thoracic margin is close and rugose^ resembling that figured 

 for Platysoma frontale, Payk., in MarseuFs Mon. fig. 13 

 (1853), and the second dorsal stria and the inner humeral 

 stria are more punctiform. The thoracic punctuation of 

 P. Mouhoti is scattered and irregular. The general outline 

 of P. asperimargo is similar to Placodes caffer, Er. It is the 

 eleventh species of Plcesius now known. 



Ilah. Burma. 



Plcesius striatipectus, sp. n. 



P. cossi/phi simillimis, sod prosterno bistriato et propygidio 



pygidioque multo minus punctatis. 

 L. 9^-10| mill. 



This species is extremely similar to P. cossT/phus, Mars., 

 but the frontal stride are less marked, the lateral thoracic stria 

 is less deep, the first dorsal stria is represented by punctures 

 at tiie base of the elytra, the apical margin of the elytra is 

 less punctulate, the pygidia are finely and more moderately 

 punctured, and the prosternum is bistriate. 



The trivial name points to a very important character. 



Hab. New Britain (.4. WV%, 1895-97). Two examples. 



Platysoma ri/uw, sp. n. 



Oblongiira, depressum, nigrum, nitidum ; fronto punctulata in medio 

 imjjressa ; pronoto lateribus punetato ; elytris striis 1-3 integris, 

 4-5 brevissimis ; mesosterno marginato ; tibiis anticis 4-dentatis. 



L. 3|-3| mill. 



Oblong, depressed, black and shining; the head, surface 

 finely punctulate, the transverse stria is somewhat obscure 



