IG-i Mr. G. J. Arrow on the 



from the Cameroons to Uganda awd the second from Sierra 

 Leone to Angola. 



Certain insects o£ this group which inhabit Madagascar 

 do not belong to any existing genus; for these I constitute 

 the following : — 



HovoPHiLEURus, gen. nov. 



Corpus elongatum, cylindricum. Caput triangulare, clypeo acuini- 

 nato, apice reflexo, Mandibula extus obtuse dentata, apice 

 acuminata, reflexa. Maxilla longe ac dense pilosa, dentibus 

 duobus gcminatis acutis inferioribus armata. Mentum elon- 

 gatum, parabolicum, antice coustrictum et bilobatum. Pro- 

 sternum antice paulo acute productum, postice erectum, trunca- 

 tum. Tibia antica acute tridentata, posteriores apica dilatatoe, 

 multidentatse et setiferae. Tarsorum posticorum articulus basalis 

 extus ■ fortiter productus, Propygidium absque striis stridula- 

 toriis. 



^ . Tarsi antici articulus ultimus inflatus, ungue interno profunde 

 bitido. 



The genus is intermediate between Phileurus and Rhizo- 

 platys. One of its species, Hovophilew'us su/cicollis, Fairm., 

 has been placed in the latter, but has not its principal 

 diagnostic feature, \iz. the dilated mentum partially con- 

 cealing the palpi. The serrate extremities of the hind tibiae 

 and the erect and truncate prosternal process also distiug\iish 

 the new genus. In addition to H. sulcicollis, Fairm., the 

 two following species are in the British Museum : — 



Hovophileurus sulcipennis, sp. n. 



Isiger, nitidus, modice couvcxus, corpore subtus brunneo-piloso, 

 capite ruguloso, antice acute producto, rertice medio tuberculato ; 

 pronoto undique parura sequaliter punctate, lateribus fortiter 

 urcuatis, angulis anticis acutis productis, posticis obtusissimis sed 

 vix rotundatis, dorso antice excavato, utriuque paulo aciimiuato, 

 fossa laxe rugosa ; scutello antice rugoso ; elytris profunde sul- 

 catis, sulcis aunulato-punctatis, interstitiis intequalibus, 2^, 6° et 

 8" la'tis, grosse puuctatis, roliquis la^vibus, alte convexis, apicibus 

 planatis, grosse et crebre punctatis ; motasterno sat dense rufo- 

 hirto : 



c? > pys^^io valde convexo, acqualitcr crebre rugoso : 



$ , pygidio minus convexo, apice subnitido. 



Long. 18-22 mm.; lat. max. 9"5-ll"5 mm. 



Hub. N. Madagascar : Diego Suarez. 



The type in the British Museum is a male, and I have seen 



