DIACAMMA. 79 



96. Diacamina assamense, Fuvel, Jour. Bomb. N.H. Socxm {l^OQ), 



pp. 318 & 319. 



^ . Black, witli a very sparse, short, erect ]nlosity 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, 

 longitudiually striate as in T). scalpratum, 

 irregularly dentate ; cly|)eus tectiforin, sub- 

 carinate down the middle, the median lobe 

 angular at apex ; antennae sparsely pilose, 

 2nd and 3rd joints of the dagellum sub- 

 equal ; head above coarsely but regularly 

 longitudiually striate. Thorax and legs 

 much as in D. scalpratum, but the pronotum 

 longitudiually striate and the mesonotum 

 not well defined ; node of the pedicel flat 

 Fig. 41. on the sides, truncate posteriorly and 



Thorax of stronglv arched from back to front, about 



Blacanima assamense, ^ . ^^ i^j^g .^^ j^^.^^^^i posteriorly. Nodal spines 



longer aud 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 coarsely striate, the striae arranged in regular 

 concentric arches from back to front. 



Length, ^ 11-12 mm. 



Hah. Assam (Smythits), Upper Burma, the Chi ad win Valley, 

 aud hills east of Myitkvina {BUigliam). 



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



pp. 159 & 105, 5 ; Forel, Jour. Bomh. N. H. Soc. xiii (1900), 

 p. 318, 5. 



5 . Closely resembles D. sculptuin, Jerdon, but is slightly larger, 

 very black, brilliant and shining. Head elongate, o\sX ; mandibles 

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

 finely longitudiually striate, the mediau lobe rounded at apex ; head 

 above the antennte longitudinally striate, oblique on the side and 

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

 pronotum with concentric stria3 on the disc enclosiug one or twa- 

 transverse stride; 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 D. seulpiiim ; abdomen very 

 massive, the striae on the basal abdomnial segment longitudinal 

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

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

 broadly smooth. 



Length, ^ 12 ram. 



Hab. Cochin (liuthjieg) ; Ceylon (yietner). 



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



