216 MANDIBULATA. — COLEOrTERA. 



gined, acute : antennae pale : thorax somewhat rugged, ohsoletely five-lohed 

 behind, with the intermediate angle acute : elytra striated, with four striae 

 of elevated oblong spots, the anterior series with elevated punctate lines : an- 

 terior tibia? simple. 



The only known example of this insect, which is in Mr. Kirby's 

 cabinet, was taken by the late Rev. P. Lathbury, I believe during 

 a flood at Livermere in Suffolk. 



Family XXIX.— DYNASTIDiE, MacLeay. 



Antenna ten-jointed; the basal joint very robust, conic, hairy; the second sub- 

 globose; the five following very short ; the remainder forming a short, ovate, 

 triphyllous capitulum. Lahrum membranaceous, generally concealed beneath 

 the clypeus, its margin frequently ciliated : mandibles convex, subtrigonal, 

 with the base thick ; the apex obtuse : maxilla corneous : palpi with the 

 terminal joint ovate, the basal joint of the maxillary minute : head sub- 

 trigonal ; clypeus frequently horned : thorax sometimes horned : elytra not 

 covering the apex of the abdomen, which is generally pubescent: body large, 

 convex, rather elongate-ovate : legs stout; tibia broad, anterior considerably 

 dentate : tarsi rather long. 



The Dynastidse live either in rich vegetable mould, or in the putrid 

 detritus which results from the decomposition of trees ; they differ 

 from the Trogidse by having the labrum concealed, and in general 

 by their gigantic bulk. 



The reputed indigenous genera may be known by the following 

 concise definitions : 



finermes: . . . . 201. Oryctes. 



lUaaillcc < 



Identata: . . . . . . 202. Dynastes? 



Genus CCL — Oryctes, Illiger. 



Antenna with the basal joint very robust, clavate, pilose; the second smaller, 

 subglobose ; the third still less, globose ; the four following transverse, very 

 short; the remainder forming a triphyllous plicatile club. Palpi with the 

 terminal joint oval: mandibles with their external edge without teeth: 

 maxilla entire, one-lobed, ciliated : mentum ovate, pilose : head triangular, 

 cornuted : thorax retuse, with the sides dilated and a little rounded : body 

 ovoid, convex, pilose : anterior tibia: tri dentate externally; posterior ciliated. 



From Dynastes ? this genus is distinguished by having the ter- 

 minal joint of the palpi ovate and not attenuated, the mandibles 



