282 DYXASTiy.E. 



252. Trichogomphus martabani. 



Scarabaeus martabfiiii, Guer., Voy. Belong. Ind. Or., ZooL, 1834, 

 p. 484, pi. 1, fig. 3 ; Arrozv, Trans. Ent. Soc. Land., 1908, p. 347. 



Trichogomphus tonkinens, Fairm., Ann. Sue. Ent. Belg., 1898, 

 p. 313. 



Shining black, with the lower surface and femora slightly 

 reddish, and scantily clothed with tawny hairs at the sides 

 beneath. 



The form is elongate and parallel-sided. Th.Q.head\s, rugose, the 

 2>ronotum rugose in front and at the posterior angles, which are 

 well-marked, and smooth and shining elsewhere. The scutellum is 

 rugose and setose in front and smooth behind. Each eh/tron has 

 a strongly impressed line of coarse annular punctures adjoining 

 the suture and two or three pairs of similarly but less closely 

 punctured lines upon the disc ; with irregularly punctured 

 intervals, and the outer margins are minutely and rather scantily 

 punctui-ed. The ^^/r/uZiuwi is nearly smooth in tlie middle but 

 strongly punctured towards the circumference and setose at the 

 base and in the lateral angles. The metasternum is coarsely and 

 scantily punctured, but almost smooth in the hinder part, and the 

 ahdomen is very sparingly punctured. 



d . The head is armed with a strong, simple, laterally-com- 

 pressed horn, moderately long and a little recurved. The prothorax 

 is subquadrate, the sides being more parallel than in the female, 

 and rather abruptly bent round in front, with the posterior angles 

 sharper. There is a distinct lobe at the middle of the base and in 

 well-developed examples this is very large and almost covers the 

 scutellum. The front part of the pronotnm is broadly excavated ; 

 the excavation is rugose except in the middle, its sides are produced 

 upwards into a tooth on each side, and the hinder part is smooth 

 and elevated in the middle into a hump, which is produced 

 slightly forward over the excavation and ends in two blunt 

 tubercles. 



In small males the curvature of the sides of the prothorax is 

 more gradual, the posterior angles are more obtuse, the hump is 

 absent, and only a slight anterior depression, bordered by two 

 lateral and two posterior minute tubercles, remains. 



2 . Tiie head is armed with a minute acute tubercle. The pro- 

 thorax has the sides curvilinear, the front angles acute and the 

 hind angles obtuse ; the disc is moderately convex, irregularly 

 I'ugose in front and in the hind angles, and almost smooth behind, 

 and the base is trisinuate. The sides of the elytra are more curvi- 

 linear than in the male. 



Length 35-56 mm, ; brcadlJi 17-27 mm. 



Assam: Manipur, Silhet ; JU'ema: Martaban, Karen Hills, 

 Kachin Hills, Metanja (L. Fca). 



