492 REVISION OF THE AUSTRALIAN SPECIES OF BOLBOCERAS, 



C. Frontal carina in front of frontal wings 



not, or scarcely, shorter than front 



margin of frontal wings. 



D. Retuse front of pronotum bearing a fine 



strongly impressed longitudinal median 



sulcus Basedow!, Blachh. 



DD. Retuse front of pronotum not longitu- 

 dinally impressed clypeale, Blachh. 



CC. Frontal carina in front of frontal wings 

 notably shorter than front margin of 

 frontal wings. 

 D. Hind extremities of frontal margins not 

 joined by a continuous transverse 

 carina. 

 E. Left mandible (viewed from above) 

 strongly and abruptly sinuate ex- 

 ternally mandibulars, Blachh. 



EE. Left mandible (viewed from above) 



not, or scarcely, sinuate externally. 



F. 14-th elytral stria not confluent 



with 15th. 



G. Hind femora contpicuously 



punctulate. 



H. Eyes not perceptibly faceted. 



I. Concavity on front part of 



pronotum cordiform .... Loweri, Blachh. 



II. Concavity on front part of 



pronotum quadrate fenestratum, Blachh, 



HH. Eyes very distinctly faceted, 



I. Pronotum with an excava- 



tion in front part and a 

 longitudinal sulcus be- 

 hind f raternum, Blackb. 



II. Pronotum evenly convex 



(the sublateral foveae 



. excepted) nitidice^s, Blachh. 



GG. Hind femora (except extreme 



front part) non-punctulate. 



H. Pronotum with a transverse 



sulcus on either side Isevipes, Blackb. 



HH. Pronotum without trans- 

 verse sulci subretusum, Blackb, 



