ANALYSIS. 507 



lead from S. sacer to this type — Mnemation — which is 

 probably confined to the north of Africa. 



The inequality of the number of species in natural 

 groupes, I have before stated as perhaps one of the most 

 curious facts in natural history. On looking therefore at 

 such groupes as the present, the entomologist should bear 

 in mind that an hiatus ought not to be confounded with a 

 saltus, however fashionable of late the synonymy of the 

 words may have been. 



TYPUS III. Antennae articulis tertio quarto et quinto longiori- 

 bus, at paulatim longitudine decrescentibus, septimo octavo 

 et nono subsimilibus capitulum subglobosum formantibus. 

 Clypeus triangularis apice bidentato. Abdomen convexi- 

 usculum circulare, thoracis margine pilis longis ciliato, 

 elytrorum margine externo post humeros rotundatos nee 

 profunde nee abrupte sinuato. Mediosternum subtriangulare 

 fere impressum. Pedes villosissimi coxis intermediis basi 

 adjunctis et til)iarum calcaribus cum tibia articulatis vel 

 mobilibus. Tibia? antics extus quadridentatae tarsis nullis ; 

 tarsis posticarum quatuor apicibus insertis unguiculis longis. 



PACHYSOMA. Kirby MSS. 



21. SCARABiEUS ater, thorace punctato, elytris punctatis vix stri- JEsculapius. 



atis, tibiis anticis intuslinea. elevata. instructis. 

 Scarabaeus ^sculapius. Oliv. Ent. 3. 187. PI. 24. f. 20f. 

 Ateuchus iEsculapius. Sch'unherr. Syn. Ins. 

 Habitat ad Cap. Bona; Spei. Mus. Brit. 



22. SCARABvEUS atronitidus, thorace punctato, elytris striatis vix Hippocrates. 



punctatis, tibiis anticis intus tuberculorum serie instructis. 

 Pachysoma Hippocrates. Kirby MSS. 

 Prsecedente duplo major habitat ad Cap. Bonae Spei. Mus. 



Kirby. 



In this, as well as in the last type, the coxa? of the inter- 



