Coleopterous Stih/uniili/ Uynastince. ICl 



indistinct. Tlic frontal tubercles of the head are more 

 distant from one another. The cedeagus of the male is 

 more like that of H. perinr/ueiji than of H. meles, but is 

 broader and without pointed processes iu its anterior part. 



lleteronychus f/labricollis, Barm., included iu Heteroligus 

 by Prof. Kolbe^ bcl()n;j:s to the genus Ciiplionhtes[ = Cephiso~ 

 dutus, Fairui.), in which the front tibia is simply three- 

 toothed and the front tarsi of the male are thickened. 

 Ci//)haiiistes impressicoUis, Fairm., is apparently a synonym 

 of the last. 



lleteronychus capreolus, Qued., another insect placed by 

 Prof. Kolbe in HeteroVinus, is one of a j^roup of species 

 having well-marked characters in common for wliich another 

 genus must be formed. The best-marked features are the 

 truncate clypeus with spinose anterior angles and the very- 

 sharp, recurved teeth at the outer edge of the mandible. 

 The species seem to be characteristic of the West African 

 fauna. I propose to call them 



Prion oRYCTEs, gen. nov. 



Corpus convexum, subcylindricum. Clypeus brevis, lateribus 

 convergeutibus, atitice truncatus, angulis acute et oblique spinoao- 

 productis. Mandibulse extus profunde incisae, dentes tres acutas, 

 ralde recurvatas, utrinque instructae. Maxillce fortiter 6-dentatte, 

 dentibus 4 inferioribus gemiuatis, palporum articulo ultimo 

 magno, truncato. Mentum autice j)rofuudo fissum, palporum 

 articulo penultimo transvcrso. Mesosternum medio erectum, 

 subcylindricum, summo truncato. Tibitc anticte acute quadri- 

 deutatae. Tibia? posticae extus apice deutibus circiter sex obtuse 

 dentatae. Propygidium striis stridulatoriis medio obsoletis sat 

 late incisum. Tarsorum posticorum articulus primus supra 

 productus. Mas et fcemina visu vix dissimiles. 



I refer to this genus, in addition to Heteronychus capreolus, 

 the three following species, the first of which may be 

 regarded as the type. 



Prionoryctes rnfopiceus, sp. n. 



Rufo-piceus, subtus breviter rufo-hirsutus, capito toto rugoso, frouto 

 medio leviter depressa, tuberculis duobus sat remotis armata ; 

 prothorace grosse, fere aequaliter, punctato, omnino marginato ; 

 scutello insequaliter punctato ; elytris annulato-punctatis, lineis 

 punctorum quatuor geminatis striaque suturali profunda, inter- 

 stitiis minute marginibusque externis confuse punctulatis : 



Ann. & Mag, N. Hist. Ser. 8. Vol. viii. 11 



