230 CEEAMBYCIDiE, 



sharply pointed at the end. Prothorax widest as a rule just a little 

 before the base, slightly constricted at the base, more or less 

 gradually narrowed in front; its length about equal to its greatest 

 breadth. Elytra gradually and slightly widened posteriorly, 

 rounded at the apex in most of the species, sometimes slightly 

 mucronate at the suture ; attenuated and spined at the apex in 

 some of the forms ; the sutural edges slightly raised, especially 

 near the apex ; the lateral edges somewhat thickened and convex, 

 formed into an obtuse ridge that extends almost the whole length 

 of each elytrou. Legs a little longer than in Pt/restes, with the 

 femora less thickened, furnished ah\ays with a fine carina at the 

 lower edge on each side. Last abdominal segment of § short and 

 broad, sinuately truncate at the apex ; between this and the last 

 tergite, the internal segment which forms a sheath to the ovi- 

 positor is usually visible; its dorsal plate is emarginate in the 

 middle and densely fringed with long tawny hairs posteriorly. 

 Last abdominal segment of c? narrowed gradually posteriorly, 

 broadly rounded at the apex ; the sixth or internal segment some- 

 times visible in the form of a thin flat plate that projects a little 

 bevond the fifth. 



259. Erythrus bicolor, IVesfw. (Saperda) Oib. Orient. Ent. p. 60, 

 pi. 29, %. 9 (1848). 



Pronotum and elytra carmine-red, entirely opaque, the pronotum 

 marked with two small, rounded, or slightly elongated black spots 

 placed one on each side of the middle of the disc ; head, antenna^, 

 scutellum, legs and underside black. Head densely and finely 

 punctulate, sparsely covered with greyish-tawny pubescence in 

 front. Antennae barely reach to the middle of the elytra in the $ , 

 with the joints from the third rather distinctly dilated, the fifth 

 angulate, and the sixth to tenth dentate at the apex on the anterior 

 side. Prothorax somewhat rugulose-punctate, widest just a little 

 before the base, narrowed very slightly thence up to the middle, 

 and more strongly from the middle to the apex ; the two black 

 spots placed on two feebly raised tubercles v.hich are covered \\ ith 

 velvety pubescence, the black colour, but not the pubescence, 

 sometimes extended a little way behind the tubercles ; the disc 

 rather strongly convex between the spots, very feebly tuberculate 

 on each side near the base. Scutellum transverse and xerx short. 

 Elytra finely and not very densely punctulate, rounded at the apex, 

 with a very short inconspicuous tooth at the suture ; each elytron 

 furnished above with a slightly raised, median, longitudinal costa 

 that extends for about four-fifths of its length from the base, and 

 another feebler costa that is placed midway between this one and 

 the suture. Body beneath, vei\y densely punctulate, the punctures 

 slightly larger on the metasternum than they are on the episterna 

 and abdomen. Femora densely and very finely punctulate. 



Length $ 17-19; breadth -^ mm. 



