490 



DESCRIPTIONS OF NEW SPECIES OF AUSTRALIAN 

 COLEOPTERA. Part xi. 



By Arthur M. Lea, F.E.S. 



(Plate xlviii.) 



Family SCARAB^ID^. 



BoLBOCERAS iNCONSUETUM, n.sp. (Plate xlviii., fig.l). 



Castaneous. Undersurface densely clothed. 



Head irregularly concave; between antennse subtriangularly 

 elevated, the middle of the elevation triangularly notched in 

 middle; with shallow feeble punctures, absent from basal portion; 

 canthi acutely margined; mandibles evenly rounded. Frothorax 

 (excluding the sublateral fovete, which are rather larger than 

 usual) with four not very large fovese, two near the front margin 

 immediately behind the eyes, and two behind these almost in the 

 middle, the two median ones separated by a distinct transverse 

 obtuse ridge, but each feebly connected with the one in front of 

 it; a short subconical tubercle in line with the ridge and almost 

 halfway between it and the side; sides with fairly dense but 

 almost obsolete punctures, with some larger distinct ones irregu- 

 larly scattered about. Scutellum impunctate. Elytra striate- 

 punctate, thirteenth and foiu'teenth striae irregularly conjoined 

 towards base. Front tihi(V with five teeth; hind ones with two 

 carinje, between the subapical and base a row of small tubercles 

 on each side. Length, 17 mm. 



Hah. — Western Australia. 



I have seen no species approaching this, except the following 

 one, and am soinewhat doubtful as to the sex of the specimen, 

 despite the presence of prothoracic tubercles, which would 

 certainly appear to be masculine; but the transverse ridge 

 between these appears to be feminine. In any case, it is not 

 likely to be confused with any othsr species. The two foveai at 



