HEXARTHRrUS. 71 



^. Loxjili (with itiaii(lil)lcs), .'{0-70 mm. ; (vvithuiit maiulibless) 

 28-ol mm. : hrcadfh, 12-20 mm. 



9. Length, 38 mm. ; hnndth, IT)-;") mm. 



Assam : Shillong, Khasi Hills ; Jaintia Hills. 



Type in the Hope Dept., Oxford University Mnscuim. 



22. Hexarthrius mniszechi. (Plate VI, fiji. 5.) 



Liiamun (Hexafthriuti) mniszechi Thom.s., Arch. Ent. i, ISoT, p. ."^00 ; 

 Lacord., Gen. Col. Atlas, pi. 24, fig. 5. 



Black or very dark red-brown, the abdomen and elytra of 

 the male a little more nnldisli than the I'est of the body ; the 

 female entirely black. 



$. Entirely black, Jiarrow in sliape, the surface dull. The 

 head is flat and strongly punctured, excei)t in its posterior 

 part, the canthus rather prominent laterally. The pronolum 

 is not very broad, smooth, with the sides finely and not very 

 closely punctured, tlie lateral margin feebly angulate behind 

 the middle, very feebly curved to the front angle and almost 

 straight to the hind angle, which is obtuse. The elytra are 

 smooth, except at the outer margins, where they are very 

 shallowh' punctured and very opaque. The front tibia is 

 minutely serrate, sharply and finely toothed, the middle tibia 

 armed with a strong lateral spine, the hind tibia witb a feeble 

 one. 



Q. Rather narrow, with the mandibles, head and pronotum 

 dull and the elji:ra very smooth and shining, except at the 

 extreme margins. The head and mandibles are clo.sely 

 granular and opaque. The sides of the head are ratlier 

 sharply angular in front of the eyes, convergent and rf)UHded 

 behincl them. Tlie canthus reaches the middle of the eye. 

 Tlie clyi)eal 2)rocess is pointed in front and angular at the base 

 on each side. The pronotum is closely granular, like the head, 

 but more finely in its median part ; it is short and (ton vex, 

 the front angle produced, the outer margin almost straight 

 to beyond the middle, where it is roundly and strongly Ijent. 

 The hind angle is rounded and obsolete. The scutdlum is 

 finely granular. The (lytra are very smooth and shining but 

 the extreme basal and lateral margins ar*.' finely coriaceous. 

 The pro.stcrnum is a little ct)mj)resscd behind but not pointecl. 

 The front tibia is long, its outer edge is finely serrate between 

 the teeth, the terminal fork is hmg and the terminal spur 

 hooked. The middle tibia bears a strong lateral sjiine and 

 tlie hind tibia none or a vestige only. 



Variation of thp male. A small male is very narrow, the 

 head (across the eyes) is only very slightly wider than the 

 thorax, the sides are rather strongly swollen behind the eyes, 

 tlie dyijcal process is transversely pentagonal, the mandibles 



