164 Mr. G. J. Arrow on the 



from the Cameroons to Uganda and 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, gcu. nov. 



Corpus elongatum, cylindricum. Caput triangulare, clypeo acuini- 

 nato, apice reflexo. Mandibula extus obtuse dentata, apice 

 acuminata, reliexa. Maxilla longe ac dense pilosa, dentibus 

 duobus gemiuatis acutis inferioribus armata. Mentum elon- 

 gatum, parabolicum, antice constrictum et bilobatum. Pro- 

 sternum antice paulo acute productum, postice erectum, trunca- 

 tum. Tibia antica acute tridentata, posteriores apice dilatatse, 

 multidentatae et setiferse. Tarsorum postieorum articulus basalis 

 extus fortiter productus. Propygidium absque striis stridula- 

 toriis. 



(S . Tarsi antici articulus ultimus inflatus, ungue interno profunda 

 bitido. 



The genus is intermediate between Phileurus and Rhizo- 

 platys. Oue of its species, Hovophileurus sulcicollis, Fairm., 

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

 diagnostic feature, viz. the dilated mentum partially cou- 

 cealing the palpi. The serrate extremities of the hind tibiae 

 and the erect and truncate prosterual process also distinguish 

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

 two following species are in the British Museum : — 



Hovophileurus sulcipennis, sp. n. 



Niger, nitidus, modice convexus, corpore subtus brunneo-piloso, 

 capite ruguloso, antice acute producto, vertice medio tuberculato ; 

 pronoto undique parum aequaliter punctato, lateribus fortiter 

 arcuatis, angulis anticis acutis productis, posticis obtusissimis sed 

 vix rotundatis, dorso antice excavato, utrinque paulo acumiuato, 

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

 ■catis, sulcis annulato-punctatis, interstitiis inaequalibus, 2°, 6" et 

 8" latis, grosse punctatis, reliquis Isevibus, alte convexis, apicibus 

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

 iirto : 



d 5 pygi<iio valde convexo, aequaliter crebre rugoso : 



? , pygidio minus convexo, apice subnitido. 



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



Hab. N. Madagascar : Diego Suarez. 



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



