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



The longer setaceous antennae and entire elytra will distinguish 

 this genus from any of the Asiatic Rhinotragince. Whether the 

 South American genera Rhopalophora, Cosmisoma, Disaulax, and 

 others should be kept apart, as M. J. Thomson has done in his 

 'Essai,' although not in his more recent ' Systema,' is a question 

 that I will not at present undertake to decide. Certainly Mimistena 

 would point to their union. 



Mimistena femorata. (PL XLI. fig. G.) 



M. nigra, nitida ; scutello niveo ; elytris viridi-metallicis ; an- 

 tennis in medio pallidis. 



Black, glabrous, shining ; head finely punctured, with short raised 

 vertical lines in front and between the antennae ; prothorax impunc- 

 tate anteriorly, the disk behind the constricted portion irregular 

 and finely punctured ; scutellum rounded, covered with a snowy- 

 white silky pubescence ; elytra dark metallic green, irregularly punc- 

 tured, the apex poiuted ; body beneath and legs glossy black ; an- 

 tennae with the sixth, seventh, and eighth joints nearly white. 

 Length 5 lines. 



Pltjtonesthes. 



Plutonesthes, J. Thomson, Syst. Ceramb. p. 160. 



Pltjtonesthes crocata. (PI. XLII. fig. 2.) 



P. nigra, pilosa ; prothorace elytrisque aurantiacis ; corpore 

 infra cyaneo-chalybeato. 



Black, with long scattered erect hairs ; head closely punctured, 

 much constricted behind the eyes ; prothorax narrow, covered with 

 a silky orange pubescence ; scutellum triangular ; elytra four times 

 as long as the prothorax, the sides parallel at the base, but gradually 

 expanding before the middle, and rounded at the apex, covered with 

 a coarse silky orange-coloured pubescence, darker or brownish at the 

 apex ; body beneath bright steel-blue ; legs glossy black ; antennae 

 opake black, hairy at the base. Length 4g lines. 



M. J. Thomson's P. rufipennis differs from the above, according 

 to his description, in its roughly punctured prothorax. He makes 

 no mention of the long scattered hairs and glossy steel-blue of the 

 under surface ; and therefore I do not hesitate in considering it di- 

 stinct. Another nearly allied species is in my collection from Sin- 

 gapore with shorter legs and apex of the elytra blue black. 



ErYTHRINjE. 



Erythrus. 



Erythrus, White, Catal. Long. Brit. Mus. p. 142. 

 Pseudoleptura, J. Thomson, Essai, &c, p. 148. 



Erythrus ignitus. 



E. niger ; prothorace coccineo, utrinque vittis duabus nigris ; 

 elytris coccineis, later aliter for titer declivibus, apice nigris. 



