BY W. MACLEAY, ESQ., F.L.S. 363 



BOLBOCERAS CAVICOLLE. 



Long. 8 lin, 



Piceo-rufum nitidum, capite anfcice cornuto — cornu longo sub- 

 recurvo postice medio triangulariter dentato, thorace antice 

 medio retuso longitudinaliter profunde excavato utrinque 

 breviter cornuto ad latera rugose punctato, elytris leviter 

 striato-puuctatis, tibiis anticis extus 6 dentatis. 

 Fetnina cornu capitis brevi baud postice angulato, thorace 



leviter retuso bituberculato. 

 Hab. South Australia. 

 Like the last, the horn on the head is long, slightly recurved, 

 and triangularly toothed in the middle of the posterior surface. 

 The thorax has a long deep excavation in the middle in front 

 which extends nearly to the base, and has a short subrecurved 

 horn on each side of the excavation. In the female the horn of 

 the head is shorter and without the angular tooth behind, and the 

 thorax is only slightly retuse and excavated, with tubercular 

 prominences in place of the horns of the male. 



BOLBOCEEAS COENIGERUM. 



Long. 9 lin. 



Piceo-rufum nitidum capite antice cornuto — cornu elongato 

 subacuto antice basi bisinuatim carinato, thorace antice 

 medio retuso modice excavato — excavatione Isevi utrinque 

 cornu brevi instructa — ad latera rugose punctato foveolato, 

 elytris striate -punctatis, tibiis anticis extus 5 dentatis. 

 Femina capite cornu brevi bifido instructo, thorace antice verti- 



cali IfBvi. 

 Hab. Swan River. 

 The horn of the head is long, pointed, and without any tooth 

 on the posterior surface. The transverse carina at the base of 

 the horn in front is emarginate in the middle, and much sinuated 

 at each side, as in B. angulicorne. The thorax is only moder- 

 ately retuse and concave in front in the middle, and has a short, 

 obtuse horn on each side of the retuse portion. The sides are 



