504 REVISION OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



fortiter convcxo, 3'^ quam 1^^ multo raajori) fronte sat vertical!, 

 eminentia frontali ut cornu simplex breve (hoc quam antenna- 

 rum stipes vix longiori) elevata; prothorace fortiter transverse; 

 supra in partibus antica mediana et postica Isevi (in partibus 

 lateralibus ruguloso — a latere versus medium gradatim magis 

 grosse), antice area sat magna sat profunde concava impresso, 

 parte concava ad latera cornu brevissimo conico (hoc quam cornu 

 frontale plus quam duplo breviori) utrinque armata, cornuum 

 interspatio quam caput angustiori, margine antico profunde bi- 

 foveolato, lateribus haud serrulatis, angulis anticis vix prominulis 

 posticis nuUis; scutello Isevi; elytris sat fortiter 15-striatis, striis 

 punctulatis (14^ 15''^que in parte antica conjunctis), interstitiis 

 sat planis; tibiis anticis extus 5-dentatis, posticis transversim 4- 

 vel 5-carinatis. Long. 6, lat, 4i lin. 



Femina latet. 



This species is a pigmy among the Bolbocerata of its Group. 

 It has the general appearance of being a very feebly developed 

 specimen of B. rhiyioceros, Macl., but differs from that insect in 

 the absence of a transverse sulcus across the excavated portion 

 (and of a coarsely punctured longitudinal depression on the hind 

 part) of its pronotum, and in the form of its antennal club. 



N. Territory of S. Australia (taken by the late Dr. Bovill). 



The Second Group differs from the First by the structure of 

 the hind tibiae, which do not bear any transverse (or obliquely 

 transverse) carinse above the one (present in all the known Aus- 

 tralian Bolbocerata) immediately preceding the apical sinuation 

 of the tibia, the upper part of the surface bearing only small 

 tubercles placed at, or close to, the lateral margins of its upper 

 face; also by the absence of the two deep round fovese (or holes) 

 on the front margin of the pronotum. It differs from the Third 

 Group by the carina dividing the clypeal arese not meeting on the 

 middle of the clypeal elevation, but being given off from (or 

 near) the lateral extremities of the clypeal elevation and usually 

 running more or less hindward instead of obliquely forward. 

 The Group is readily divisible into two Subgroups, distinguished 



