690 REVISION OP THE GENUS HETERONYX, 



distinctly " punctured " so much as " closely wrinkled transver- 

 sely ;" the prothorax is a little more strongly transverse than 

 in rhinastus, the tarsi are shorter and more slender, and the 

 colour of the unique example before me is entirely different ; in 

 other respects I do not observe any noteworthy distinction between 

 the two. The narrowly and very strongly elevated labrum together 

 with the absence of rows of setiferous granules and of an apical 

 pencil of seise from the elytra will distinguish it from H. 2>ustulosus 

 and elongatus, while the exceptionally well defined " trilobed " 

 appearance of the outline of the head, with the middle lobe 

 prominent, and not more than half as wide as the lateral lobes, will 

 prevent the confusion with it of any other of its allies. The basal 

 joint of the hind tarsi is decidedly shorter than the 2nd. 

 Mulwala, N.S.W. j taken by Mr. T. G. Sloane. 



H. LAMINATUS, Sp.nOV. 



Minus elongatus ; postice leviter dilatatus ; minus nitidus ; 

 brunneo-testaceus, tibiis tarsisqne sub-inf uscatis ; supra crebre 

 subtilius sat sequaliter (pygidio minus crebre excepto) punctu- 

 latus ; pilis brevibus adpressis crebrius vestitus ; labro clypeum 

 latissime sat fortiter superanti ; antennis 9-articulatis ; unguiculis 

 appendiculatis ; unguiculorum posticorum parte basali apical- 

 paullo longiori, apice vix dentata ; coxis posticis metasterno hand 

 brevioribus. [Long. 3f, lat. 2 lines (vix). 



Almost, if not quite, unique in the genus by the great develop- 

 ment of the labrum which causes the middle lobe of the "trii 

 lobed outline " of the head to appear decidedly wider, and much 

 longer than the lateral lobes. Its place is evidently near If. 2^us- 

 tulosus, from which (apart from size, the relation of labrum and 

 clypeus to each other, and the absence of setiferous pustules), it 

 differs as follows : the clypeus is less emarginate in front, and 

 more nearly on an even plane with the rest of the head ; the 

 clypeal suture is distinctly carinate ; the prothorax is more than 

 J again as wide as long and is more rounded laterally with ante- 

 rior angles less produced and base scarcely at all lobed hindward 



