D1ACAMMA. 79 



96. Diacamma assamense, Forel, Jour. Bomb. N. H. Soc. xiii (1900), 



pp. 318 & 319. 



. Black, with a very sparse, short, erect pilosity and very 

 minute but abundant pale pubescence, giving the insect a dull 

 yellowish appearance. Head elongate, oval, slightly narrower 

 posteriorly than in front ; mandibles broad, 

 longitudinally striate as in D. scalpmtum, 

 irregularly dentate ; clypeus tectiforra, sub- 

 carinate down the middle, the median lobe 

 angular at apex ; antennae sparsely pilose, 

 2nd and 3rd joints of the flagellum sub- 

 equal ; head above coarsely but regularly 

 longitudinally striate. Thorax and legs 

 much as in D. scalpratum, but the pronotum 

 longitudinally striate and the mesonotum 

 not well denned ; node of the pedicel flat 

 Fig. 41. on the sides, truncate posteriorly and 



Thorax of strongly arched from back to front, about 



Diacamma assamense, $ . as i on g as broad posteriorly. Nodal spines 

 longer and stouter than in any other Indian 



species, pointing backwards, the whole surface of the node covered 

 with coarse but regular concentric striae ; abdomen short, massive, 

 the basal segment coarselv striate, the striae arranged in regular 

 concentric arches from back to front. 

 Length, % 11-12 mm. 



Hob. Assam (Smythies), Upper Burma, the Chindwin Valley, 

 and hills east of Myitkyina (Bingham). 



97. Diacamma ceylonense, Emery, Rend. Ace. Sci. Bolog. i. (1897), 

 pp. 159 & 165, ; Forel, Jour. Bomb. N. H. Soc. xiii (1900), 

 p. 318, . 



. Closely resembles D. sculptum. Jerdon, but is slightly larger, 

 very black, brilliant and shining. Head elongate, oval ; mandibles 

 castaneous red, finely striate, strongly dentate ; clypeus convex, 

 finely longitudinally striate, the median lobe rounded at apex ; head 

 above the antennas longitudinally striate, oblique on the side and 

 on the front between the eyes. Thorax elongate, narrow ; the 

 pronotum with concentric striae on the disc enclosing one or two- 

 transverse striae; mesonotum not distinctly defined ; metanotum 

 with the striae irregularly transverse on the disc, longitudinally 

 oblique on the sides and transverse at the apex ; legs long and 

 stout. Node of the pedicel as in Z). sculptum ; abdomen very 

 massive, the striae on the basal abdominal segment longitudinal 

 and outwardly divergent from front to back, 2nd segment with a 

 zone of short longitudinal striae in the middle, the base and apex 

 broadly smooth. 



Length, $ 12 mm. 



Hob. Cochin (llothney) ; Ceylon (Nietner). 



I am not very certain about this species. Emery states that it 



