472 Mr. David Sharp's revision of the 



of the under surface is much denser than in R. modestus, 

 and the antennal club is a good deal more elongate. 



Mr. Helms has sent me several specimens of this 

 insect from Greymouth. 



Rygmodus unguicularis. 

 Late ovalis, parum convexus, nitidus, niger, elytris cyaneis ; 

 unguicularum lobo stibtus valcle curvato apice longiias libero. Long. 

 9 mm., lat. 5 mm. 



This is, though very similar to the preceding species, 

 a rather larger and flatter insect, with the punctuation 

 on the disc of the thorax much more developed, the 

 hind angles of the thorax more broadly rounded, and 

 the elytral stride not deeper behind. It is distinguished 

 by a good and very easily perceived structural character 

 from the other species, viz., the form of the appendage 

 to the claws, as given in the diagnosis. 



We are indebted to Professor Hutton for the discovery 

 of this species ; he sent me three specimens from 

 Dunedin in 1878. 



Rygmodus ovalis, n. s. 

 Ovalis, angustulus, parum convexus, niger, elytris cyaneis; 

 dense punctatus, praetereaque in elytris seriatim punctatus. Long. 

 8 mm., lat. 4 mm. 



Of narrower and more elongate form than the other 

 species, and readily distinguished by the dense com- 

 paratively evenly distributed punctuation of the upper 

 surface, the elytral stria3 being on the other hand re- 

 duced, so that they are inconspicuous amongst the 

 diffuse punctuation. The antennae and palpi are quite 

 black ; the punctuation of the thorax is the same at the 

 sides and on the middle, and the base of the thorax is 

 more rounded and less bisinuate than in the other 

 species ; the striation of the elytra is quite distinct at 

 the apex, but at the base is only to bo distinguished as 

 rather larger punctures placed in a serial manner 

 amongst the other punctuation, which is close and 

 rather coarse. The pubescent punctuation of the under 

 surface is very dense and fine. The tarsal claws are 

 rather more feeble than in the other species. 



Mr. Wakefield gave me a specimen found on the West 

 Coast by Mr. Slack ; and Mr. Helms has recently met 



