140 
Eutrypanus, no constant mark of difference existing other than 
the absence of smooth lateral keels proceeding from the shoul- 
ders of the elytra. From Acanthocinus it is distinguished by the 
high vertical sides of the wing-cases, the tuberculose surface of 
the body, and the dilated anterior and middle tarsi of the males. 
Xylergates lacteus, n. sp. 
X. oblongus, supra planiusculus, postice sensim attenuatus, brunneo 
sericeus : elytris strigis curvatis lacteis plagas griseas includentibus, 
apice siimato-truncatis, angulis exterioribus productis. Long. 6|- 
7 lin. d ? . 
Head tawny brown. Antennse ringed with grey and black. 
Thorax with large obtusely conical lateral tubercles near the 
middle of the sides, and with two obtuse tubercles on the fore 
part of the disk, besides three other smaller ones on the poste- 
rior part ; surface purplish brown, silky, sides below the tuber- 
cles ashy. Elytra broad and straight at the base, thence gradu- 
ally narrowed to the apex, which is somewhat broadly sinuate- 
truncate, the external angles of the truncature produced ; de- 
flexed sides (towards the base) thickly granulate-punctate ; sur- 
face with numerous small punctures towards the base, and with 
four or five interrupted rows of acute blackish tubercles sur- 
mounted by short bristles, the middle ones lying along the faint 
dorsal carinse ; 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 light-grey 
colour and shorter milk-white streaks, the anterior curved lateral 
lines being connected across the suture by a thin straight line 
of the same hue. Body beneath tawny ashy. Legs grey, with 
dusky rings. 
S Middle of breast and coxse 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, coxse, 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 *. 
* The following common South-Brazilian insect belongs to the genus 
Xylergates : — 
Xylergates asper, n. sp. Oblongus, supra convexiusculus, postice ro- 
' tundatira attenuatus, cinereo-fulvus, sericeo-brunneo plagiatus. Caput 
