560 



NOTES ON AUSTRALIAN COLEOPTERA, 



elytris crebre subtilius, punctulatis ; labro clypeum sat late 

 minus fortiter superanti ; antennis 9-articulatis ; unguiculis 

 appendiculatis ; unguiculorum posticorum parte basali apicali 

 sat longiori, apice sat acute producta ; coxis posticis meta- 

 sterno vix brevioribus ; elytrorum membrana apicali valde 

 producta. [Long. 3^, lat. 1^^ lines. 



In my tabulation of the species of Heteronyx having the labrum 

 elevated above the clypeus, the antennoe 9-jointed, and the claws 

 appendiculate (P.L.S.N.S.W., 1889, pp. 662-668) there might be 

 a doubt whether the present species should be placed under " C " 

 on p. 664 (as having close fine and even puncturation) or under 

 "CO " on p. 666 (as having the puncturation less fine and close) 

 as in " C " it would be a little sparsely punctured and in " CC " a 

 little closely. I should refer it to the latter group. If, however, 

 it were referred to "C" it would stand under "GG" p. 666, 

 along with suhferrugineus, Burni., from which it is very distinct 

 indeed inter alia by its utterly difierent puncturation, — e.g., the 

 metasternum having a well defined moderately close and strong 

 puncturation on a nitid derm. If referred to " CC " it would 

 stand along with jyosticalis, Blackb., under " FF " p. 667 from 

 which it difiers inter alia by having the basal joint of tlie hind 

 tarsi not shorter than the second ; the apical membrane of its 

 elytra, however, though quite exceptionally developed, is not quite 

 so sharply defined as in posticalis. The labrum of the single 

 example before me is strongly hollowed out so that when the 

 trilobed outline of the head is examined the middle lobe appears 

 concave (if this be not an individual peculiarity it will at once 

 distinguish the species from almost every other in the genus). 

 Taking all characters into account the present species is I think 

 nearest to R. longulus, Blackb., which it closely resembles in respect 

 of puncturation (the punctures beiiig however a trifle finer and 

 closer than in that species) ; apart from characters already 

 mentioned it difiers, however, in not having the sutuie of the 

 elytra carinate behind and distinctly produced at the apex. From 

 flavus this insect difiers inter alia by the well defined uppermost 



