^GUS. 181 



strongly punctured dci)ression in the middle. Tlie sides are 

 straight and convergent in front, with acutely produced angles, 

 and strongly rounded behind, without angles. The scttteUum 

 is strongly ])uneture(l. The di/fm are very d?eply striate, 

 the intervals ecjual and tinely ])unctured and the sid'.-s and 

 apices densely rugose. The mentum is very cctarsely rugo.se. 



^. Shape, broad and flat. The h(ad is very l)r()ad and flat, 

 without excavation or median ])rojection, tinely coriaceous and 

 opaque, with fine and incons])icuous scattered ])unctures at the 

 sides, the front margin nearly vertical, its front edge strongly 

 subangularly emarginate, with the extremities of the emargin- 

 ation acutely ])roduced, the sid^s <>i the head nearly straight 

 and i)arallel, with a very slight prominence behind the eye on 

 eacli side. ThO mandibles are long and gently curved, with 

 a short sharp basal tooth beneath and a fairly long one al)ove. 

 The pronotum is short, oijatjue, with tlie margin rugo.sely 

 punctured all round, excejjt in the middle of the front margin. 

 There is a very feeble longitudinal im])ression in the middle 

 po.steriorly, contahiing a double series of fine punctures, which 

 become coarser and confluent near the hind margin. The 

 sides are straight and ]mrallel, with the front angl?s obliquely 

 truncate or excised an(l the hmd angles broadly rounded. The 

 scutellum is ])unctured. The fh/tm have each six deep dorsal 

 stria; with smooth flat intervals and two less dee]) lateral striae, 

 and tlie sides are densely ])unctured and a little flattened. Tlie 

 shoulders are acute-angled and tlu^ outer margins goitly 

 rounded. The mentum and sii})ui('ut((i)i are finely gramilar and 

 o])a(|ue, the metaHternum is shining in the middle and slightly 

 hollowed there, rugulose at the sides, and the abdomen is finely 

 and unevenly })unctured. 



Variation of the, male. In the smallest specimens the lower 

 tooth of the mandible is wanting. In those of medium size 

 the upper tooth is close to the base and directed a little back- 

 ward. In larger s])ecimens it recedes from the base and 

 assumes a more forward direction. In the large t,>^ie sjieci- 

 men this tooth arises just in front of the middle and ])oiiits 

 oblicjuely forward. In the large exam])le the head, ])r<)notum 

 and elytra are relatively broader than in smaller ones and the 

 surface of the pronotum and elytra is duller. The mentum 

 of the large specimen bears a very few punctures. These 

 become more nmnerous in smaller ones. 



(^. Length (with mandibles), 37-44 mm. ; (without man 

 dibles) 25-31 nun. : breadth, 12-5-1 5-5 mm. 



9. Length, 2») mm. ; Imeidth, 1 1 mm. 



Assam: Manijnu- (If. Doherty). Burma: Ruby Mines 

 {W. Doherty) ; Loi Kyaw, Ta^v^lg Peng, Shan States, "'(iOOO ft. 

 {J. Coggin Brown, Feb., March). ? Bengal : Darjeeling. 



Type in the Oberthiir collection. 



