cerambycidjE. 229 



stantium, scabroram postice setigerorum ; thorace subnigro, 

 arcu elongato antice pilis argenteis, lateribus flavescentibus. 

 Long. lin. 4. 



Head blackish-brown varied with greyish hairs, a band of 

 greyish hairs across the vertex. Antennae yellowish, first joint 

 brown, ends of joints brownish ; all the joints, but especially the 

 terminal ones, covered with short close hairs, inside of third, 

 fourth and fifth joints with longish scattered hairs. Thorax 

 blackish above and on the sides, with a triangular yellowish spot 

 behind, a large horse-shoe-shaped arch on the back, the front not 

 reaching the fore margin and covered with a silvery pubescence, 

 the sides yellowish ; two little curved streaks of white hairs before 

 the dorsal triangle. Scutellum pale, with close silvery pile. 

 Elytra pale tawny-yellow, each with four obscure blackish bands, 

 that nearest the base oblique and curved up towards the shoulder, 

 the second about the middle, the third and fourth close to each 

 other and not far from the apex, which is strongly mucronated ; 

 each elytron with five longitudinal rows of impressed points, the 

 hind margin of which is raised, and each produces a strongish 

 bristle directed backwards ; under side of thorax and abdomen 

 pale, the segments of the latter margined with brown. Legs 

 pale, with longish scattered hairs ; posterior femora reaching to 

 end of elytra, with two short spines at the end. 

 Hab. Amazon (Tapayos) (Coll. W. B. Bates). 



29. Ibidion basale, n. s. B.M. 



I. capite flavescente, antennis pallidis, articulo primo et secundo 

 ferrugineis, tertio et quarto nigris, illo basi pallido; thorace 

 quinque verrucis, media maxima. ; elytris pallidis nigro varie- 

 gatis, singulis sulco basali notabili, ad medium elytri attin- 

 gente. 

 Long. lin. 4i. 



Head pale yellowish, the face with a widish heart-shaped im- 

 pression ; antennae pale yellow, two basal joints ferruginous ; 

 third and fourth joints black, the former pale at the base, the 

 joints from the second to the sixth with longish scattered hairs 

 on the outside, third and fourth with a few on the inside. Thorax 

 pale yellowish varied with white silky pile on the sides, the back 

 with five warts, the largest in the middle and grooved down the 

 centre. Elytra pale, with a blackish-brown mark at the base 

 extending to the middle and cut obliquely at the side, the base 

 of the patch somewhat warty and with two smooth ferruginous 

 lines, one on the suture and one inside the shoulder ; a deepish 

 wide groove extends as far as the middle ; the apical half of each 

 elytron with two brownish -black blotches; each elytron with 



