OF NEW ZEALAND. 1017 



This species is readily distinguished by the blight- coloured femora. 

 In general aspect it is excessively similar to the larger, more ob- 

 scurely coloured varieties of R. modes tus, and differs but little from 

 it in details ; it has, however, the punctuation on the disc of the 

 thorax less effaced, that of the interstices of the wing-eases slightly 

 more distinct, and the explanate or flattened-out side of the thorax 

 broader. It varies a good deal in the punctuation, and in the con- 

 vexity of the interstices ; it is not a mere variety of E. modes tus, as, 

 besides the evident, though slight, distinctions of sculpture and of the 

 colour of the legs, the minute pubescent punctuation of the under- 

 surface is much denser than in R. modes tm, and the antennal club 

 is a good deal more elongate. 



Mr. Helms has sent me several specimens of this insect from 

 Greymouth. 



1822. R. tibialis, n.s. Oblong-oval, rather broad, moderately 

 convex, shining ; black, head and thorax bluish-black, elytra nigro- 

 cyaneous ; antennas and palpi fuscous, the basal joint of the former 

 and the tips of the other joints, as well as of the palpi, paler ; femora 

 rufo-testaceous ; tibiae reddish, not much darker than the thighs ; 

 club opaque. 



This species is most nearly allied to P. femoratus. Head closely 

 and distinctly punctate ; the frontal and lateral margins scarcely at 

 all raised, the former a little incurved. Thorax more closely (yet 

 quite finely) punctured than in R. modestus, more coarsely near the 

 sides, these latter more flattened, basal foveae well marked. Scutel- 

 lum with a few fine punctures. Elytra punctato-striate ; interstices 

 convex, their punctuation not more distinct than in -Z?. modesties ; 

 the lateral rims more expanded or prominent, and somewhat ru- 

 fescent. 



In some examples the head has the frontal margin considerably 

 elevated and projecting a little beyond the raised sides : these, I 

 believe, are males. 



Length, 4 ; breadth, 2|- lines. 



Mount Arthur. Messrs. Cheeseman and Adams. 



1823. R. oyalis, n.s. (Sharp ; Trans. Ent. Soc. Lond., 1884, 

 p. 472.) Ovalis, an gus turns, parum convexus, niger, elytris cyaneis ; 

 dense punctatus, praetereaque in elytris seriatim punctatur. 



Long. , 8mm . ; lat . , 4mm . 



Of narrower and more elongate form than the other species, and 

 readily distinguished by the dense comparatively evenly distributed 

 punctuation of the upper surface, the elytral striae being on the other 

 hand reduced, so that they are inconspicuous amongst the diffuse 

 punctuation. The antennce, and palpi are quite black ; the punctua- 

 tion 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 be distinguished as rather larger 

 punctures placed in a serial manner amongst the other punctuation, 



