70 MARTIN JACOBY 



Length 2 lines. 



Head impunctate , deeply transversely grooved between the 

 eyes; frontal tubercles in shape of a transverse narrow ridge 

 separated at the middle; clypeus triangular; antennae gradually 

 widened towards the apical joints, black, the ilrst two or three 

 joints fulvous, terminal joint llavous; thorax transverse, the an- 

 terior portion sw^oUen, the sides o])liquely shaped and deeply 

 constricted near the base, the latter with a deep transverse 

 groove extending to the sides; elytra distinctly wider at the 

 base than the thorax, obsoletely depressed below the base vio- 

 laceous blue, shining, closely and distinctly punctured, the 

 punctures arranged in semiregular rows; anterior legs, all the 

 tarsi and the four last abdominal segments llavous ; posterior 

 femora and tibiae as well as the breast, black. 



Sumatra, Mt. Singalang, July (0. Beccari). 



Seven specimens were obtained. 



Thrasychroma , n. gen. 



Body oblong-ovate ; eyes entire ; palpi rather robust , the pe- 

 nultimate joint swollen, transverse, terminal joint conical, acute; 

 antennae filiform, tho second joint short, third joint three times 

 as long, the following ones gradually shortened; thorax nar- 

 rowly transverse , not widened at the middle , the posterior 

 margin obliquely cut at the angles; surface transversely grooved 

 at each side of the disk; scutellum trigonate, its apex obtusely 

 rounded ; elytra with a transverse depression below the base , 

 closely and irregularly punctured, their epipleurae indistinct 

 below the middle ; posterior femora moderately incrassa te , their 

 uppei' edge strongly convex ; tibiae simple , unarmed ; the first 

 joint of the posterior tarsi as long as the two following joints 

 united; claws appendiculate; presternum very nari'ow; anterior 

 coxal cavities closed. 



The genus here proposed is characterised by the transverse 

 and sulcate thorax , the groove of which is placed at the middle 

 of the disk , by the unarmed tibiae and closed coxal cavities as 



