82 



Family. DYNASTID^E, MacLeay. 

 Genus. Megaceras, Kirby. 



Type of the Genus. Geotrupes Chorin^us, Fab. 



Caput in mare unicorne, cornu simplici, apice 

 bifido, antice convexo, postice canaliculate 



Mandibulce validse apice bilobse, basi dilatatse 

 intus subciliatse. 



Maxillce ungulatse, interne inermes. 



Palpi maxillares 4-articulati articulo l mo brevi, 

 2 d0 longiori suboblongo, 3 tio obconico, extimo elon- 

 gato-ovato subtruncato. 



Mentum* subtrigonum apice truncato basi paullo 

 angustiori. 



Labium obsoletum vel internum. 



Palpi labiates 3-articulati articulis duobus primis 

 obconicis, ultimo longiori apice attenuato. 



Antenna? 10-articulatse, articulo l mo basi angusto, 

 apice crassiori, sequentibus sex fere moniliformibus, 

 clava subovata trilamellata. 



Corpus oblongum. 



Thorax postice abdominis latitudine, e basi antice 



* Labium, Kirby, in Linnean Transactions. 



