BY REV. T. BLACKBURN. 525 



APPENDIX. 



After the preceding pages had been forwarded to the Linnean 

 Society, a ver}^ interesting undescribed species of Bolboceras came 

 before my notice in the S. A. Museum. It is described below : — 



B. PONTIFERUM, sp.nOV. 



Mas. Latum; breve; sat nitidum; supra glabrum; subtus hir- 

 sutum; rufum; capite rugulose subgrosse minus confertim (clypeo 

 magis crebre) punctulato, elevatione frontali ut cornu modicum 

 inerme glabrum erecta; prothoracequam longiori ut 12 ad 7 latiori, 

 supra fere Isevi (partibus lateralibus mediis sat rugulosis exceptis), 

 parte antica magna profunde excavata, hac utrinque cornu brevi 

 crasso tri-apiculato armata et in fundo longitudinaliter abrupte 

 elevata (parte elevata sat lata supra planata antice et postice 

 dilatata, ad latera abrupte declivi), marginibus lateralibus vix 

 crenulatis, margine antico profunde bifoveolato, angulis anticis 

 vix prominulis posticis rotundatis; scutello subtiliter punctulato; 

 elytris sat fortiter punctulato-striatis, stria 15^cum 14** haud 

 coeunti; tibiis anticis extus 5-dentatis, posticis transversim multi- 

 carinatis. Long. 7, lact. 5 lin. (vix). 



Femina latet. 



This very distinct species is a member of Group i. in the pre- 

 ceding tabulation. Unfortunately the unique type has lost the 

 club of both its antennie, which makes a difficulty in placing it 

 in the tabulation. If the antennal club is normal the species 

 must stand beside 2Iacleayi, Blackb., if its antennal club is glo- 

 bose its place is beside Bovilli, Blackb., from both which species 

 (and from all others known to me) the remarkable form of the 

 excavated portion of its pronotum readily distinguishes it. That 

 excavation is a large and deep cavity (resembling in area and 

 depth the corresponding cavity in B. rhinoceros, Macl.), which is 

 traversed longitudinally by an elevation suggestive of a bridge 

 or viaduct. The horns of the pronotum are stouter and much 

 shorter than those of B. rhinoceros, and each of them is truncate 



