of the Group Cerambyeime. 23 



more obliquely outwards. These differences may perhaps be 

 little more than individual. 



Elydnus, Pasc. 



This genus is even more nearly allied to Dymasius than is 

 Imbrius. It will be best perhaps to consider it as a distinct 

 section of Dymasius, characterized by the unspined apices of 

 the elytra and the prothorax almost equally contracted at the 

 base and apex. I can find nothing in the characters of the 

 antenna? and sternal processes by which it can be distinguished 

 generically from Dymasius. In addition to the species 

 placed in it by Mr. Pascoe, the section will include D. stri- 

 yosus } Pasc. I propose to alter the name of this species to 



Dymasius [Elydnus) P.iscoei } n. n. 

 = Dyma$iu8 strigoms, Pa*c. (nee Thorns.). 



Dialeyes undulatus, sp. n. 



D. pauperi subsimilis, sed differt inter alia capite pone oculos minus 

 elongato ; oculis valde einarginatis, baud divisis ; articulo anten- 

 narum quinto quam tertio longiore, articulo undecimo (J) 

 longissimo ; elytris apice eonjuuetim rotundatis, inermibus. 



Long. ( J 2 ) 16-21, lat. 3] -5 mm. 



Hab. Siam, Burmah, and Ceylon. 



Head but slightly elongated behind the eyes ; the latter 

 deeply enough emarginatc in front. Prothorax somewhat 

 longer than broad, constricted at the base and apex, slightly 

 rounded at the sides ; transversely and not very strongly 

 Avrinkled above ; covered, with the exception of a line along 

 the middle of the disk, with a silky greyish pubescence. 

 Elytra clothed with a dense silky pubescence, giving moire 

 reflexions ; where rubbed the reddish-brown derm is seen to 

 be closely and very finely punctulate; apices conjointly 

 rounded and unarmed. Head transversely wrinkled below 

 between the eyes. Antennae in the male more than twice as 

 long as the body, with the third and succeeding joints villose 

 underneath, with the third joint shorter than the fifth, the 

 fifth, sixth, and seventh subequal, the fifth to tenth gradually 

 decreasing and, taken together, scarcely longer than the 

 eleventh : antennae in the female a little longer than the 

 body, with the eleventh joint scarcely longer than the tenth. 



This species has at first sight a rather strong resemblance 

 to D. pauper y Pasc., and allied species, but is to be distin- 

 guished by characters that may almost be considered generic 

 in their importance. 



