BY THE REV. T. BLACKBURN. 579 



than those of D. validus. I am much puzzled as to the sexes of 

 these insects, — the smaller and narrower sex of this species has on 

 the apical ventral segment a circular fovea very nitid inside and 

 quite surrounded by a defined edging (quite different from, — but 

 nevertheless resembling the sexual character of the larger and 

 broader sex of D. validus) while the larger and broader sex of 

 this species has the hinder part of the apical ventral segment 

 widely sulcate, — the sul cation not quite reaching the apex (after 

 the same plan as in the smaller and narrower sex of D. validus). 

 This species may be distinguished from all previously described 

 by the following combination of characters, — elytra wide across 

 the humeral processes, scape of antennae not abnormally short, 

 tarsi normally slender, colour very sombre, antennal tubercles in 

 inner row 3 or 4, no strongly prominent longitudinal costse on the 

 sides of the elytra, general surface not clothed with erect setse. 

 S. Australia ; Fowler's Bay. 



DiALEPTOPUS OBSOLETUS, Sp.nOV. 



Sat elongatus ; niger, haud squamosus ; rostro baud transverse 

 in medio late profunde sulcato ; antennis minus crassis, scapo 

 extrorsum minus incrassato minus brevi (quam tarsorum 

 anticorum articulus 4"^ vix breviori), funiculi articulis 1° et 

 2° ceteris sat longioribus ; prothorace apice bilobo, lateribus 

 sat rotundatis ; elytris prothorace paullo latioribus, tuberculis 

 in seriebus 2 (interiore circiter 5 subobsoletis, exteriore 5 

 conicis, constitutis) armatis, inter hsec dorso sat crasse 

 foveolato, lateribus crassissime seriatim foveolatis (interstitiis 

 fortiter convexis), latitudine trans processus humerales quam 

 trans prothoracem paullo minori. [Long. 1% lat. 2| lines. 



The sculpture of the elytra in this species is very peculiar and 

 very difficult to describe intelligibly ; the external row of tubercles 

 is of the usual kind, but the internal row consists of prominences 

 which can hardly be called tubercles, — the appearance is somewhat 

 as it would be if these had been tubercles which had been sliced 

 off almost level with the general surface, so that looked down 

 upon from above there is little to be seen of them, but viewed 



