XOANODEEA. 149 



grooved near base and apex. Elytra parallel-sided, narrowed 

 near the apex ; each with a posterior subrnarginal cariua, with 

 the apex truncate and more or less distinctly bidentate. Pro- 

 sternum raised between the coxae, sharply deflexed posteriorly, 

 and dilated at the end so as to almost meet the epiniera. 

 Acetabula of front coxae not angulated outwards. Legs mode- 

 rately long ; femora carinate on each side near their lower portions ; 

 first joint of hind tarsus shorter than the next two united. 



The most distinctive of these characters is the presence of a 

 submarginal carina on the posterior part of each elytron. The 

 three species included in the present fauna are all characterized 

 by the presence of a very strongly and closely punctured dark 

 brown lateral area that extends from the base to a greater or less 

 extent past the middle of each elytron. 



I. Elytra with glabrous dark brown streaks posteriorly. 



153. Xoanodera trigona, Pascoe, Trans. Ent. Soc. (2) iv, p. 92 r 

 pi. 23, iig. 1 (1857); id. (3) iii, p. 527 (1869); Lacord. Gen. 

 Coleopt., Atlas, pi. 85, fig-. 1 (not a good figure). 



Dark brown ; with a yellowish-white pubescence that covers 

 the head, the sides of the prothorax, and a considerable part of 

 the elytra ; the latter each with a large, glabrous, very strongly 

 punctured dark brown area at the side that extends from the base 

 to the posterior third and spreads more than halfway across the 

 elytron near the middle of its length, there are also four or five 

 longitudinal glabrous streaks between this area and the apex and 

 a few also near the base ; antenna?, legs, and underside covered 

 with greyish or tawny-grey pubescence. The antennae extend 

 past the apex of the elytra by about their last joint in the $ ' and 

 their last two in the d 1 ; third joint very slightly longer than the 

 first and about one-third longer than the fourth ; fifth to tenth 

 strongly and sharply angulate or subdentate at the apex on the 

 anterior side, eleventh a little longer than the tenth, shortly 

 appendiculate. Prothorax rounded, rugose and pubescent at 

 the sides ; glabrous above, furnished with a variable number of 

 sharp longitudinal costae. (In the type from Singapore there are 

 about ten costse, four of which are straight and very sharply 

 defined, the others placed more towards the sides, slightly curved 

 and somewhat irregular; in two specimens from Mergui there 

 are only two longitudinal costae, the disc of the prothorax be- 

 tween them and the sides irregularly and somewhat intricately 

 rugose.) Elytra very strongly punctured, with the punctures 

 larger and very closely placed on the large dark brown areas at 

 the sides and also near the base, smaller and less dense on the 

 glabrous streaks near the apex ; the submarginal carina of each 

 elytron near the apex very distinct ; the apex of each rather 

 strongly bidentate. 



Length 20-24 ; breadth 5-6 mm. 



Hab. Tenasserim : Mergui (Doherty) ; Ma 1 ay Peninsula t 

 Penang ; Binding Is. ; Singapore. 



