90 



Genus. Xyloryctes, Hope. 

 Type of the Genus. Geotrupes Satyrus, Fab. $ 



Caput unicorne, cornu simplici recurvo, clypeo 

 dentibus acutis armato. 



Mandibulce apice oblique truncatae, seu margine 

 interno obliquo, membrana setosa interne instruct®. 



Maxilla 3-unguiculatae dentibus internis minori- 

 bus, apicali acuto. 



Palpi maxillares 4-articulati articulo primo cylin- 

 drico, 2 d0 crassiori suboblongo, 3 ti0 obconico, ultimo 

 elongato truncate 



Mentum subtrigonum basi angustiori lateribus 

 rotundatis, apice truncatum. 



Palpi labiales brevissimi 3-articulati duobus primis 

 subtrigonis, tertio longiori ovato. 



Corpus oblongum crassum. 



Thorax inermis trunctatus et declivis. 



Femina thorace antice convexo, capite postice 

 corniculo armato. 



This genus is closely allied to Oryctes of Illiger. 

 An insect sent to me from the United States, by 

 Monsieur Leconte, under the name of Satyrus, dif- 

 fers from the species in the Fabrician Cabinet. I 

 propose, therefore, to give to this second species the 



