1866.] MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. 517 



Pyrestes virgatus. (PI. XLII. fig. 4.) 



P. yiiger, opacus ; prothorace elytrisque coccineis, Mo vitta nigra 

 mediana, his sutura apice scapidisque nigris, apicibus conjunc- 

 tim rolundatis. 



Black, except the prothorax and elytra ; head a little narrowed 

 below the eyes, and comparatively rather coarsely punctured ; pro- 

 thorax longer and narrower than in any of the above, its posterior 

 border scarcely broader than the anterior, vermilion, with a narrow 

 median stripe and its sides black, coarsely and deeply punctured, the 

 interstices anteriorly forming slightly waved transverse lines ; scu- 

 tellum narrowly triangular ; elytra rather narrow at the base, vermi- 

 lion, the suture, shoulders, and apex black, closely and deeply punc- 

 tured aud much more coarsely at the base, the apex rounded and 

 without any mucro ; body beneath black ; legs short ; antennae with 

 the third joint longer than the scape, the fourth as long as the pe- 

 nultimate, the sixth to the tenth inclusive broadly dilated. Length 

 4 1 lines. 



Pyrestes nigricollis. 



P. niger, opacus; elytris (sutura, apice scapulisque exceptis) 

 coccineis, apicibus extus rotundatis, ad suturam submucronatis ; 

 abdomine apicem versus rufescente. 



Black, except the elytra ; head narrow and elongate below the 

 eyes, closely punctured on the vertex ; prothorax black, rather sud- 

 denly constricted anteriorly and as broad as the head, covered with 

 deep somewhat crowded punctures ; scutellum narrowly triangular, 

 raised at the sides ; elytra rather narrow, scarcely broader posteriorly, 

 vermilion, the suture, shoulders, and apex black, closely punctured, 

 the punctures much coarser at the base, the intervals subgranulose, 

 the apex of each rounded externally, but having a slight mucro at 

 the suture ; body beneath black, the last two or three abdominal 

 segments reddish ; legs rather slender ; antennae with the third joint 

 longer than the scape, the fourth as long as the last four or five joints. 

 Length 6 lines. 



All the species (eight) of this genus are very distinct, as a com- 

 parison of their diagnostic characters will show. Mr. Wallace ap- 

 pears to have met with only a single example, P. eximius, at Sarawak. 

 Mr. Bowring found P. cardinalis not uncommonly at Hong Kong. 

 Tb« other two, P. miniatus and P. hcematicus are from Northern 

 India and Northern China respectively. 



Callichromiisle. 

 Chloridolum. 

 Chloridolum, J. Thomson, Syst. Ceramb. p. 174. 



Chloridolum thomsoni. 



CalKchroma thomsoni, Pascoe, Trans. Ent. Soc. ser. 2. v. p. 24. 



