74 LUOANID^. 



The iViualc is unknown. 



o. LoK/fh (witlnnaniUhles), 30-00 nun. : (\vitlu)ul mandibles) 

 27—40 nun. : hnadth. 12-15> mm. 



Assam : Sliilloiiii, Khasi' Hills : Maiiipur (W . Doherty). 

 Type in M. Rene Oberthiir's collection. 



•2~>. Hexarthrius davisoni. (Plate VI, fig. 4.) 



He-cirthriits daclsoni Wat.,* Ann. Mag. Xat. Hist. (0) i, 1 SSS, p. 260 ; 



Boil., Trans. Knt. Soc. Lond. 1913, p. -111. 

 H. caatetsi Boil., Aim. Soe. Ent. Fiance. Ixvi. 1S97, p. 581. figs. 

 H. coiesi Xonfr.. Berl. Ent. Zeitschr. xxxvi, 1892. p. 365 



Black, the eMra deep brick-red, with the sntural and lateral 

 margins narrowly black, not sharply detined but passing into 

 the red coloiu-, the upper surface dull, not shining. Rather 

 narrowly elongate, moderately convex, with slender legs, the 

 four posterior legs eacli bearing a lateral spine. The antennal 

 club consists of five joints, the preceding joint slightly produced. 

 The presternum prominent and compressed behind but not 

 pointed. 



2. The upper surface is a little less dull than that of the 

 male, but the head and the sides of the pronotum are rugosely 

 l)unctured. The head is not very broad, the canthus not 

 projecting laterally. The mandibles are ratlier narrow at the 

 base and eacli has a small, rather sharp, tooth near the middle 

 of the iimer edge. The pronotum is tinely and sparsely 

 pimctured in the median part and tlie punctures become 

 progressively stronger and closer towards tlie sides. The 

 front angles are bhmtly produced, the lateral margins very 

 feebly curved to beyond the middle, where the}- are bluntly 

 angulate, and concave to the hind angles, which are fairly 

 sharp. The elytra are very finely and closely pimctured, the 

 punctures becoming jirogressively closer from the sutun> to 

 the outer margins, wiiich are punctate-rugose and opacjue. 

 The front tUna is fairly stout, tlie outer edge unevenly .serrate 

 and the tip broadly forked. 



Q. Entirely opaque above, except close to tlie el^^tral suture. 

 The head is densely granular, the cantluis ])rojecting a little 

 beyond the eye but not very sharply angular. There is a 

 slight blunt jirominence behind the eye. The clypeal })roce.ss 

 is triangular, fairly sliarp, in fn nt and bearing a blunt process 

 on each side of the ba.se. The mandibles are slender ami not 

 ver\' stout. The pronofiitn is tinely and very densely granular. 

 The front angles are bluntly jiroduced, tlie sides nearly straight 

 and feebly divergent to beyimd the middle, bluntly angular 

 there and gently concave to the hind angles, which are well 

 juarked but not sharp. The elytra are opaque, except at the 

 suture, where they are shining and almost smooth, but become 

 gradually more doselv coriaceous froni there to the outer 



