248 MR. F. P. PASCOE ON THE C0LEOPTERA OF PENANG. [May 8, 



line, only a little less convex, approximates this genus to Sarothro- 

 cera, from which it would be distinguished by the form of the head, 

 nearly unarmed prothorax, and toothed mesostemum. The example 

 here described betrays a certain resemblance to some of the larger 

 species of Oncideres. 



Thestus oncideroides. (PI. XXVII. fig. 7.) 



T.fuscus, pube ferruginea albo irrorata tectus ; antennis nigro 

 fimbriatis ; elytris pallide sub-bifasciatis. 



Dark brown, covered with a short close yellowish-ferruginous pu- 

 bescence, minutely speckled with whitish on the elytra ; head uni- 

 formly ferruginous, lip short, not fringed ; prothorax very short, its 

 anterior and posterior portions slightly grooved, a few punctures 

 behind the middle on each side ; scutellum subscutiform ; elytra 

 finely punctured, more or less sprinkled with minute white spots, 

 which are collected at about the middle to form a broad but rather 

 indefinite band, behind this a similar but narrower one ; the base with 

 numerous small black granules, apex rounded ; body beneath, legs, 

 and antennae ferruginous, the latter with its fringe brownish black. 

 Length 14 lines. 



Cerosterna. 



Cerosterna, Blanchard, Hist. Nat. des Insectes, t. ii. p. 158 (ab. 

 err. Celosterna). 



Cerosterna approximator, Thomson, Syst. Ceramb. p. 552. 



From the short description given by M. Thomson I am some- 

 what doubtful of this species. If in the reference to C. clathrator, 

 and this in its turn to C. reticulator, it is to be assumed that the 

 same style of antennae characterizes the three, then the specimen 

 in Mr. Lamb's collection, which has black simple antennas, will 

 probably be different. 



Metopides. 



Caput antice latissimum. 



Antennae distantes, haud fimbriates, scaposubcylindrico,cicatricoso. 



Prothorax angustus, transversus, lateraliter armatus. 



Mesostemum dentatum. 



Head somewhat triangular in front, very broad along the line of 

 the antennary tubers, which are stout and somewhat raised across 

 the forehead. Eyes narrow, broadly emarginate. Antennae longer 

 than the body, distant at their insertion, not fimbriated ; the scape 

 subcylindrical, a little irregular at the apex, and strongly cicatricose ; 

 third joint as long as the scape, the rest gradually shorter, except 

 the last, which is a little longer than the preceding. Prothorax 

 short and narrow, irregular or rugose, the sides strongly toothed, the 

 base bisinuate, not broader than the apex. Elytra a little depressed, 

 broadest at the base, rounded at the apex. Legs somewhat slender; 

 the femora not thickened ; tibiae straight ; tarsi equal. Mesostemum 

 toothed. 



In its widely separated antennae this genus resembles Biastocera ; 



