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protuberance, surface dark brown, with blackish spots on the 
disk and fulvous spots on the sides, a curved ashy streak below 
the lateral protuberance. Scutellum black. Elytra oblong, not 
narrowed until near the apex, at which point they are suddenly 
narrowed to the tip, which is obliquely truncated; surface 
thickly punctured, except near the apex, dark purplish brown, 
sides with greyish marks, and disk spotted with black, some- 
times varied also with obscure greyish and fulvous streaks and 
spots, a more distinct but short oblique pale line existing, in all 
examples, on each elytron a little before the middle near the 
suture ; the apical margin, both sutural and external, has a neat 
ashy border, which, being joined to a prseapical fascia of the same 
hue, encloses a transverse blackish spot. Body beneath clothed 
with silky grey pile. Legs more or less reddish, with ashy and 
black rings. 
cS Terminal abdominal segment with dorsal plate semicircu- 
larly notched at the tip, ventral with a shallower notch. 
2 Ovipositor greatly elongated, the sheath extending more 
than two lines beyond the tips of the elytra; dorsal plate finely 
pointed, ventral cleft at the tip. 
A widely distributed insect in the Amazons region, being 
found on the banks of the Tapajos and near Ega on the Upper 
Amazons. The species has also been met with by M. Bar in the 
interior of French Guiana. Cayenne examples agree precisely 
with those found at Ega; but those brought from the Tapajos 
are much lighter in colour, and have many tawny spots on the 
upper surface of the thorax and elytra, which are wanting in 
those of other localities. 
4. Toronaus terebrans , n. sp. 
T. oblongus, convexiusculus, fuscus ; thorace antice maculis quatuor 
fulvis in serie transversa dispositis : elytris nigro griseoque nebu- 
losis, medio macula communi cinerea, ante apicem linea transversa 
fulva. Long. 4 lin. c? . 
Head velvety black, cheeks ashy, vertex with a short ashy line. 
Antennae reddish testaceous, bases of joints (except the basal 
two) pallid, apices dusky. Thorax very little broader than the 
head, the sides in the middle with a distinct conical protuber- 
ance ; surface blackish, sides streaked with ashy, fore part with 
a transverse row of four distinct tawny spots, an obscure oblique 
line of the same hue extending from the base towards the disk 
on each side. Elytra oblong, not narrowed until near the apex, 
at which point they are suddenly narrowed to the tip, the latter 
obliquely truncated; surface thickly punctured, except near the 
apex, purplish brown, varied throughout with pale bluish grey 
and patches of a black colour, apical part clear brown (including 
