the Summit of Mount Roraima. 495 



is not much narrowed anteriorly (as compared with R. exo- 

 letusy &c.), with a distinct impressed medial line; with a few 

 punctures near the side and along the front margin ; obscure 

 yellow, with a broad black stripe in the middle, widened in 

 front and at the base, crossed in the middle by a broad trans- 

 verse band. The elytra are yellow, irrorated with black 

 somewhat as in R. exohtus^ but the black prevails to a much 

 greater extent, so that the discoidal area is ahnost entirely 

 black, leaving a narrow yellow sutural line, and the yellow 

 marginal stripe very narrow and somewhat interrupted, 

 whilst the margin itself is more broadly black ; the under 

 margins are yellow. The coxse are marked with reddish 

 yellow, and the trochanters are almost entirely of this colour. 

 The anterior tarsi are very little incrassate, with narrow pads ; 

 the claws moderately long and slender, all but equal. 



The only species in the Museum collection which closely 

 resembles this is one from Tahiti, and which I believe to be 

 R. dehilis, Sharp ; but that differs from the present species in 

 being less convex, lighter in colour, with more yellow legs 

 and antennse, whilst the prosternal process is black. Both 

 these species appear to be allied to R. pacificus. 



Pectinicornia. 

 Charagmophoeus, gen. nov. 



Insect parallel, convex. Mentum transverse, obliquely 

 narrowed in front, with the angles arcuately rounded, the 

 front gently emarginate. Antennje as in ticortizus. Eyes 

 less than one-half divided by the canthus, which in the male 

 is flattened and projecting laterally. Prosternal process pro- 

 jecting backwards, gently arched. Mesosternum sloping and 

 slightly concave. Anterior tibiaj denticulate. Intermediate 

 tibiae with one small spine. Posterior tibige without spines. 

 Tarsi rather long, the first four joints with a fringe of long 

 hairs arising from the apical margin of each joint. 



I think the affinities of this genus are evidently with 

 Scortizus. 



Charagmophorus lineatus, sp. n. 



cJ . Parallelus, sat convexus, nitidus, niger ; capita parum nitido, 

 longitudine fere triplo latiori, antice arcuatim emarginato, im- 

 punctato, oculorum cantho deplanato, angulatim producto ; man- 

 dibulis capita duplo longioribus, crassis, depressis, ad apicera 

 acuminatis incurvatis et leviter retiaxis, intus medio dentc sat 

 valido armatis, dento ipso trituberculato ; thorace parum nitido, 



