362 MISCELLANEA ENTOMOLOGICA, 



retuso valde excavato — excavatione postice carina trans- 

 versa et utrinque lato bifido cornu instructa — elytris striato- 

 punctatis interstitiis subconvexis subtiliter punctatis, tibiis 

 anticis extus sex dentatis. 

 Femina capite bituberculato clypeo apice bidentato, thorace 

 baud profunde excavato — excavatione antice utrinque tuber- 

 culo instructa. 



Hab. South Australia. 



The head in the male is furnished with two strong divergent 

 horns, united at the base in a semicircular transverse elevation, 

 and is bidentated on the sides, the posterior dentation being large 

 and triangular. The thorax has a very deep excavation in front, 

 extending nearly to the base, which is bounded behind by a trans- 

 verse carina, on each side by a broad horn bifid at the apex, and 

 in front by an extension of the apical border. 



The female differs from the male in having the clypeus biclen- 

 tate, the horns of the head mere tubercles, and the thorax less 

 excavated, with tubercles in the place of the broad horns of the 

 other, and the apical margin distinctly tuberculated in the 

 middle. Seven teeth may be counted on the fore tibiae of this 

 species, but the uppermost one is very minute. 



The following have only one horn on the head : — 



BOLBOCERAS ANGOLICORNE. 



Long. 10 lin. 



Piceo-rufum aitidum capite antice cornuto — cornu longo subre- 

 curvo postice medio triaugulariter dentate antice ad basin 

 carina sinuata instructo, thorace brevi valde retuso ante 

 medium bicornuto — cornubus latis subtruncatis subrecurvis 

 — ad latera punctato subfoveato, elytris striato-punctatis, 

 tibiis anticis extus 5 dentatis. 



Hab. Port Curtis. 

 Though differing in many ways there is a close affinity in this 

 insect to B. Rhinoceros mihi. The chief differences are the 

 angular tooth on the back of the horn of the head, the much 

 bisinuated " carina " at the base of the horn in front, the very 

 broad thoracic horns, and the more deeply striato-punctate 

 elytra. I have not seen the female. 



