LAMELLICORNS OF OLIVIER. 323 



Sp. 159. Eridanus. I consider this insect as the type of 

 a subgenus, to which I have given the name of Holocephalus, 

 (from oXoQ and KecpaXi),) from the clypeus being entire. It is a 

 form peculiar to the New World, and is allied to the genus 

 Dichotomius in some of its leading characters. The following 

 details may be stated, and are sufficiently ample for recognising 

 a well known form. 



*' Holocephalus, Hope. Type of the genus Copris Eridanus, 

 Olivier. 



" Caput cornigerum clypeo integro, antice rotundato : thorax an- 

 tice excavatus retusus, angulis anticis subporrectis foveaque 

 laterali utrinque excavata : corpus crassum gibbum, elytris 7 striis 

 fortiter insculptis : pedes femoribus robustis, tibiis antice atten- 

 uatis postice dilatatis trigonis." 



To this subgenus belong Copris Carolimis and Monaclms of 

 Fabricius, Copris Nasutus and Rhinoceros of Hope ; all of them 

 inhabiting the new world. It may here be noted, that 

 Olivier erroneously gives but six striae to Copris MonacJms, 

 Fab. ; the whole of these Copridw certainly possess seven, 

 without including the sutural. 



Sp. 167. Tridens. There can be little doubt that this 

 insect is a Plianwus. Fabricius gives Africa as the country 

 where it is found. Olivier, adopting that opinion, mentioned 

 equinoctial Africa. I am opposed to both of the above au- 

 thorities, and substitute South America as its true locality. 



Sp. 171. Sidcator. This insect is evidently the same as 

 Copris Nisiis of Fabricius. 



Sp. 179.* Fefriigineiis. In the Parisian collections, this 

 insect bears the name of Copris Egena, De Jean. 



Sp. 184. Variolosus. Scarahceus Semipunctatus, Fab. is the 

 same species as Sc. Variolosus^ Olivier. 



Sp. 187. JEscidapius. No locality is attached to this species 

 by Olivier, It will be found to be from the Cape of Good 

 Hope. 



Sp. 193. Hesperus. This beautiful insect appears to com- 

 bine the characters of Phanwus and Copris. Olivier gives 

 Madras as its locality ; it is, however, a South American insect, 

 and very abundant in the Brazils. 



Sp. 197. Leeds. Now a Coprobrius of Latreille, and the 

 same insect which Fabricius has named Ateuchus volvens. 



