328 Mr. G. J. Arrow on a Contribution to the 



Hetcronychus sublmvis, Fairm. 

 Bull. Soc. Ent. Belg., 85, 1891, p. 123. 



Niger, nitidus, ovatiis, capite rngoso, clypeo sat lato, meclio 

 bidentato, fronte bituberculato, prothorace fere Isevi, lateribus 

 arcnatis, antice paulo approximatis, angulis acutis ; scutello lajvi ; 

 elytris sat grosse striato-pvinctatis, linea suturali subobsoleta, lineis 4 

 discoidalibus postice abbreviatis, 4 lateralibus integris punctisqne 

 irregularibus ; propygidii lineis stridulatoriis subtiliter sculpturatis, 

 sat distantibiis ; pygidio minute et crebre piinctato, apice Isevi ; tibia 

 antica dentibus tribus acutis aliisque minutis arniata. 



Long. 18'5-22 mm. Lat. max. 9'5-13 mm. 



Hob. Assam; Rangoon; Malay Peninsula. 



Black or piceoiis, elongate, oval. The head is coarsely 

 rugose with the front bituberculato, and rather broad at 

 the anterior margin, which bears two minute tubercles 

 placed near together. The pronolum is almost imper- 

 ceptibly punctured at the sides, with the lateral margins 

 broadly curved and slightly narrowed anteriorly, the front 

 angles acute and the hind angles obtuse. The scutellum 

 is smooth. The elytra show a vestige of a punctured 

 sutural stria and four pairs of lines of strong punctures, 

 the first two pairs abbreviated behind. There are a few 

 similar punctures in the intervals and the lateral and 

 apical borders are strongly and irregularly punctured. 

 The propygidium is scarcely punctured and the stridulating 

 files rather distant and very finely sculptured. The 

 pygidiura is finely and densely punctured except towards 

 the apex. The front tibiie are furnished with three strong 

 acute teeth and supplementary denticles. 



$ . The front tarsus is slightly thickened and the inner 

 claw very broad, with a strong basal tooth. 



The species resembles H. pundolineatus, Fairm., (of 

 which I have been able, by M. Lesne's kindness, to 

 examine a co-type), but the marginal tubercles of the 

 clypeus are placed closer together, the pronotum is less 

 visibly punctured, the stridulating files are finer and 

 farther apart, and the pygidium is more finely and closely 

 j)unctured. 



The following new species is remarkable for its extreme 

 smoothness : — 



