new Species of Ilistcii Jiu. 231 



JMegalocPwERUS, gen. no v. 



Cori)us cylindricum ; caput retractile ; epistomum excavalum; frons 

 utrinque marginata ; maiidibulae aequales, robustse ; antennae 

 foveolis in angulo prothoracis detectis ; pronotum stria marginal! 

 Integra ; elytra G-striata ; prosternum basi truncatum, mar- 

 ginatum ; mesoslernum antice sinuatum ; propygidium trans- 

 vcrsum, breve ; pygidium semicirculare vis convexum ; tibite 

 fossa tarsali recta, parva et profunda. 



The genus established here is represented by a species 

 liaving the superficies of Pachijcrcerus^ but the mesosternuni 

 is not produced anteriorly and the tarsal grooves in the ante- 

 rior tibiae are straight. The antennal fossettcs are similar to 

 those of Exosternus. 



Megahcrcerus rubri'catus, sp. n. 



Cylindricus, robustus, niger, nitidus ; elytris basibus late rubris, 

 striis 1-6 integris, tenuiter impressis ; prosterno bistriato ; meso- 

 sterno antice late sinuate ; propygidio pygidioque punctatis ; 

 tibiis anticis 5-dentatis. 

 L. 4 mill. 



Cylindiical, robust, black and shining, the elytra broadly 

 imbricate at their bases except on the sutural border ; the 

 head is feebly punctulate and the lateral stria well-marked 

 over the eyes ; the thorax, marginal stria complete but ex- 

 tremely fine anteriorly, along the lateral border the punctua- 

 tion is similar to that on the head ; the elytra, strise are line, 

 outer humeral and 1-6 dorsal complete, the fifth and sutural 

 being joined at the base, of the inner humeral there is only a 

 trace behind the middle; the propygidium and pygidium are 

 clearly punctate, the points on the latter are the more evenly 

 set ; the prosternum is bistriate, striae parallel ; the meso- 

 sternuni is widely sinuous anteriorly and the marginal striae 

 continue along the sides of the metasternum ; the anterior 

 tibiae are 6-dentate and the intermediate and posterior are also 

 very similarly dentate. 



IJab. Jatahy, Province Goyas, Brazil. There is an 

 example also in the British Museum taken by A. R. Wallace 

 in the Amazon Region. 



rachycrcerus p-asinus, sp. n. 



Ovalis, parum convexus, supra viridi-metallicus ; fronto distiucte 

 punotulata ; elytris striis i-4 iutegris, 4 tenuiter imprcssa, 5 di- 

 midiata, suturali basi abbreviata ; propygidio i)ygidioque sat dense 

 punctatis ; tibiis paullulum dilatatis. 



L. ;'>T mill. 



