228 Mr. G. Lewis on 



there is also an oblique stria, dorsal 1-4 eomplete, 5 apical 

 and not reaching tlie middle, sutural shorter, broken and ill- 

 defined, along the apical margin are a few scattered punctures ; 

 the propygidium is irregularly punctate, with fine points 

 along its base ; the pygidiuin has similarly large punctures 

 more evenly set, and the posterior rim is raised ; the pro- 

 sternum is sparingly and finely punctulate and is without 

 stride ; the mesosternum is sinuous behind the keel and the 

 marginal stria is complete ; the anterior tibiaj are 4-5- 

 dentate. 



Somewhat similar to P. laliolum, Lew., but more oblong 

 and more depressed, and the dorsal striation is different. The 

 punctuation of the pygidla is very similar in both species, 

 but the pygidiuni is not marginate in P. baliolum. 



Ilah. St. Thomas, Gulf of Guinea [Mocquerys). 



Platysoma obliquum, sp. n. 



Elongatum, dcpressum, nigrum, nitidum ; fronte punctulata, trans- 

 versim baud striata ; prouoto stria marginali antice interrupta ; 

 elytris striis, 1 apice subabbreviata, 2-3 intogris, 4 apicali, sutu- 

 rali paullulum longiorc, obliqua ; prosterno striis antice diver- 

 gentibus, postice abbreviatis; mesosterno sinuate baud marginato; 

 tibiis anticis 4-dentatis. 



L. 3-3| mill 



Elongate, depressed, black and shining ; tlie liead very 

 lightly impressed anteriorly, surface punctulate and striate 

 over "the eyes only ; the thorax, marginal stria interrupted 

 behind the middle of the neck ; the elytra, striae, outer 

 humeral complete, inner wanting, dorsal 1 slightly abbre- 

 viated apically, 2-3 complete, 4 very short and apical, 5 

 wanting, sutural longer than the fourth, oblique and abbre- 

 viated apically ; the propygidium and pygidium are slightly 

 convex, evenly and not densely punctulate, the apex of the 

 latter is almost smooth ; the prosternum is bistriate, striee 

 divergent anteriorly and do not pass beyond the coxee behind ; 

 the mesosternum is broadly sinuous, with a short hamate stria 

 on either side not close to the margin nor reaching the poste- 

 rior edge ; the metasternum and the first segment of tiie 

 abdomen have a well-marked lateral stria ; the anterior 

 tibia are 4-dentate. 



The species of this genus are probably very numerous in 

 Madagascar, but those known at present are the above, P.quad- 

 riculh's, Lew., P. Ricliteri, Sch., P. jJuIvinatum, Sch., and 

 P. Fairmairei, Thery, all very distinct species. 

 Llah. Fort Dauphin, Madagascar. 



