518 REVISTOX OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



(superue vise) extus vix sinuate; capite fere ut B. mandibular is, 

 Blackb., sed oculis manifeste graniilatis; prothorace ut ^. mandi- 

 bidaris; scutello in?eqnaliter subfortiter punctulato: elytris sat 

 fortiter 15-punctulato-striatis, striis 14^ 15''*que baud inter se con- 

 fluentibus; interstitiis basin versus leviter convexis; femoribus 

 posticis (parte antica summa sat crebre punctulata excepta) sub- 

 tus sparsim subgrosse punctulatis; tibiis ut B. mandibularis. 



FeminseC?) fronte paullo minus concava. Long. 34-4, lat. 2i-2J 

 lin. 



This species closely resembles B. mandibidare, Blackb., but 

 differs from it by very much smaller size, left mandible scarcely 

 sinuate externally, eyes quite evidently faceted and hind femora 

 less closely and less conspicuously punctulate on the area between 

 the row of setiferous punctures and the near neighbourhood of 

 the front margin. There are before me five specimens taken 

 by the Calvert Expedition, and I possess two in my own collection 

 also from the far North of W. Australia. Two of them are much 

 smaller than the others, and have evidently less close clypeal 

 puncturation; these I take to be males, though, if so, the sexual 

 differences in this species are unusually feebly marked. 



N. W. Australia. 



B. SUBRETUSUM, Sp.nOV. 



Mas C?). Breve; subrotundatum; sat nitidum; supra glabrum; 

 subtus hirsutum; rufobrunneum ; mandibulo sinistro (superne 

 viso) extus vix sinuato; capite fere ut B. mandibularis, Blackb., 

 sed carina f rontali transversa breviori nee arcuata, capitis margine 

 ma«"is definito fere ad oculi marginem anticum continue; oculis 

 manifeste granulatis; prothorace fortiter transverse, supra acer- 

 vatim sat grosse punctulato, pone marginem anticum retuso, 

 supra partem retusam obtuse leviter bifido (parte retusa sub- 

 insequali sparsim sat fortiter punctulata), pone medium longitu- 

 dinaliter leviter impresso: scutello sparsim punctulato; elytris ut 

 B. mandibularis, Blackb.; femoribus posticis (parte antica summa 

 excepta) l?evibus; tibiis ut B. mandibidaris. 



Feminre (?) fronte minus concava, creberrime sat aequaliter 

 punctulata. Long. 4^-5, lat. 24-3i lin. 



