516 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Nov. 22, 



Erythrus differs from the next genus, Pyrestes, principally in its 

 short prothorax ; in other characters there are variations : but the 

 two, although closely allied, are distinguishable at a glance. The 

 sculpture of the prothorax and elytra is somewhat peculiar. It con- 

 sists of minute crowded punctures, especially on the elytra, with the 

 intervals so raised as to give them the appearance of being equally 

 minutely granulated, shagreened as it were ; pubescence is almost 

 wanting, except in E. apiculatus. Erythrus used by Mr. Walker 

 for a genus of Chalcididce was never anything but a catalogue name, 

 and therefore it does not appear to me to be necessary to change Mr. 

 White's. 



Pyrestes. 



Pyrestes, Pascoe, Trans. Ent. Soc. ser. 2. iv. p. 96. 



Pyrestes politus. (PI. XLII. fig. 6.) 



P. niger, nitidissimus ; elytris impunctatis, apicibus subbimucro- 

 natis, Icete coccineis, macula preeapicali excepta ; abdomine 

 rufo, nitido. 



Deep black, except the elytra, and very smooth and glossy ; head 

 rather broad below the eyes, finely punctured ; prothorax at the apex 

 nearly as broad as the head, transversely striate anteriorly, and nearly 

 impunctate ; scutellum oblong, very convex, narrowed behind ; elytra 

 less than twice as long as the head and prothorax, impunctate, rich 

 glossy vermilion, except a large black prseapical spot, the base irregu- 

 larly furrowed on each side of the scutellum, the sides with a strongly 

 marked raised margin, the apices emarginate, with the sutural angle 

 mucronate, and the external only slightly produced ; abdomen dark 

 vermilion, shining, sterna black ; legs rather stout ; antennae with 

 the third joint shorter than the scape, fourth shortest of all, except 

 the second. Length 10 lines. 



Distinguished, inter alia, from P. eximius, which are the only 

 two glossy species at present known, by its bimucronate elytra. 



Pyrestes scapularis. (PI. XLII. fig. 5.) 



P. niger, opacus; prothorace elytrisque (sutura, apice scapulisque 

 exceptis) coccineis, his apicibus extus rotundatis, ad suturam 

 mucronatis ; abdomine nigrescente. 



Head black, narrowed below the eyes and sparingly punctured, the 

 vertex closely punctured ; prothorax at the vertex as broad as the 

 head, deep vermilion, black at the sides and the anterior border, with 

 deep crowded punctures ; scutellum narrowly triangular, concave ; 

 elytra bright vermilion, the suture, shoulders, and apex black, closely 

 punctured, the punctures coarser at the base, the intervals subgra- 

 nulose, the apices rounded externally but slightly mucronate at the 

 suture ; body black, but having a reddish tinge on the abdomen ; 

 legs short ; antennae with the third joint longer than the scape, the 

 fourth not shorter than the four or five terminal joints. Length 

 8 lines. 



