108 Lt.-Col. Winn Sampson on 



surface very deeply punctured and covered with thick, black, 

 erect hairs ; there is an obscure median line on the basal 

 third. Scutellum absent. Elytra slightly more than twice 

 as long as the prothorax and broader except basally, where 

 they are abruptly narrowed to the size of the prothoracic 

 base, increasing in width until again narrowed at the blunt 

 apex, punctate-striate, the interstices convex, with rows of 

 punctures and short semi-erect scale-like brownish hairs, 

 the declivity somewhat abruptly rounded both dorsally and 

 laterally. Anterior coxze widely separated. The antennas 

 and tarsi testaceous. 



Long. 6'3 mm. 



Hub. Sarawak, Borneo {Bryant). 



This species differs from any other of the genus known to 

 me by the greater size, the increasing breadth of the elytra 

 apically, the very deeply punctured thorax, the different 

 construction of the antenna! club, etc. 



There is an undescribed specimen collected at the same 

 time with parallel-sided elytra and of smaller size, which may 

 prove to be the male when more material is available. 



The next species was taken also in Sarawak (Mt. Matang) : — 



Diamerus matangi, sp. n. 



Black, slightly shiny. Front elongate, concave, and 

 narrow, closely punctured and with a central depression ; 

 eyes large, vertical, and not emarginate ; funicular joints 

 somewhat hairy, club solid, not broadened apically and 

 having a septum placed diagonally from the basal third to 

 the centre, and another faintly marked one immediately 

 anterior to the first and parallel to it. Prothorax transverse 

 with rounded sides and very slightly contracted anteriorly 

 and at the base, the whole surface semi-opaque, closely and 

 evenly punctured with a faint median line from the base 

 towards the centre. Scutellum absent. Elytra more than 

 twice as long as, and slightly broader than, the prothorax 

 except at the immediate base ; punctate-striate, the inter- 

 stices convex with rows of semi-erect hairs and punctures ; 

 the elytral surface convex from base to apex where there is 

 a very slight thickening of the sutural angle. The anterior 

 coxae are widely separated. 



Long. 4"5— 5"1 mm. 



Hab. Sarawak, Borneo (Bryant). 



This species is very similar to the last, but smaller, and 

 has a differently constructed antcnnal club, the prothoracic 

 punctures are also much smaller. A similar broadening of 



