522 REVISION OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



convex (notably less flat than in B. imp'ressicolle, Blackb.). The 

 pronotum is slightly or scarcely less retuse in front, more so in 

 some specimens than in others, but this seems to me a matter of 

 variation rather than sex (which is not Macleay's opinion). The 

 subretuse portion is more or less distinctly impressed down the 

 middle, and its lateral part on either side is separated from the 

 extreme front margin of the pronotum by a somewhat conspicuous 

 transverse furrow. The undersurface of the hind femora is very 

 sparsely punctulate, and the front tibic^ are 6-dentate externally. 

 The frons in one sex is extremely sparsely (as sparsely as in 

 impressicolle, Blackb.), and in the other somewhat closely, 

 punctulate. In both sexes the clypea-1 elevation has a strong 

 tubercle in the middle and another at each extremity {i.e., where 

 it meets the frontal margin). 



B. OBSCURius, sp.nov. 



Fem.(?). Breve; subrotundatum; sat nitidum; supra glabrum; 

 subtus hirsutum; ruf obrunneum ; mandibulo sinistro (superne 

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

 (fern. ?) sed eminentia cl^^peali vix tuberculata, eminentia frontali 

 tuberculiformi, oculis manifeste granulatis; prothorace fortiter 

 transverso, supra minus sparsim minus acervatim (partibus pos- 

 ticis et postico-medianis sat sparsim) punctulato. longitudinaliter 

 (antice leviter, postice valde prof unde) impresso, antice subretuso 

 (parte retusa minus nitida dupliciter punctulata, so. subtiliter 

 et fortiter): scutello subtiliter punctulato; elytris fortius 15- 

 punctulato-striatis, striis 14^ 15''^que antice inter se confluentibus 

 (9^ antice fortiter abbreviata), interstitiis leviter subconvexis; 

 femoribus posticis subtus sparsim punctulatis; tibii.s fere ut B. 

 mandihularis sed anticarum dente 6^' externo vix perspicuo. 

 Long. 4, lat. 'I'i lin. 



The most conspicuous characters of this species are the close 

 even puncturation of the whole upper surface of the head (pro- 

 bably different in the other sex), which is similar to that of the 

 most closely punctured part of the head of the preceding sp. {B. 



