of the Amazon Valley. 21 
dorsal carinze ; the colour is silky purplish brown, with (on each 
elytron) a curved milk-white streak from the shoulders to near 
the apex bending towards the suture, and two obliquely transverse 
similar streaks near the apex, all enclosing patches of a lght-grey 
colour and shorter milk-white streaks, the anterior curved lateral 
lines being connected across the suture by a thin straight hne 
of the same hue. Body beneath tawny ashy. Legs grey, with 
dusky rings. 
3 Middle of breast and coxe thickly clothed with brown 
pubescence. ‘Terminal abdominal segment with ventral and 
dorsal plates deeply notched, the angles of the ventral notch 
acute, of the dorsal obtuse. Fore and middle tarsi dilated and 
fringed with hairs. 
2 Breast, coxe, and tarsi simple and naked. Ovipositor pro- 
jecting the length of a line beyond the tips of the elytra; dorsal 
plate broad and obtuse at the tip. 
This elegant and rare species occurred only at Ega and S, 
Paulo, Upper Amazons. It has since been found also in the 
interior of French Guiana by M. Bar *. 
Group Colobotheine. 
Genus Eurrypanvs (Dej. Cat.), Thomson. 
Thomson, Classif. des Cérambye. p. 13. 
Char. emend. Body oblong or subelongate, above somewhat 
plane. Thorax with stout lateral spines or tubercles placed near 
the middle of the sides, above tubercled or convex. Elytra 
much broader than the thorax, their deflexed sides broad and 
vertical, and separated from the dorsal surface by a sharp keel 
proceeding from the shoulder; surface furnished with sete, 
apices truncated. Prosternum narrow; mesosternum broad, 
nearly square. Terminal abdominal segment in the males more 
* The following common South-Brazilian insect belongs to the genus 
Xylergates :— 
Xylergates asper,n. sp. Oblongus, supra convexiusculus, postice ro- 
tundatim attenuatus, cinereo-fulvus, sericeo-brunneo plagiatus. Caput 
sordide fulvo-cinereum. Antenne robustie, breviuscule, cimeree, arti- 
culis apice fuliginosis. Thorax supra inzequalis, trituberculatus, fulvo- 
cinereus, disco plaga obscura brunnea, tuberculis lateralibus magnis 
acutis. Elytra oblonga, postice (¢ 2 ) rotundato-attenuata, breviter 
oblique truncata, supra punctata, utrinque quadricostata, costis ante 
apicem abbreviatis, tubercula nigra hispida gerentibus; fulvo-cinerea, 
plaga indistincta scutellari alterisque duabus apud medium lateralibus 
angulatis sericeo-brunneis. Corpus subtus fulvo-cinereum. Pedes 
cinerei, fusco annulati. Maris pectore nudo, segmento ultimo abdo- 
minali fortiter inciso, tarsis anticis intermediisque dilatatis, nec ciliatis. 
Foemine stylo modice elongato, segmento ultimo dorsali subacuto. 
Hab, in Brasilia mevidionali. 
