of the Amazon Valley. ji 15 
of spine or tubercle; above dark chestnut-colour, silky, sides 
and a central vitta continuous with that of the head yellowish. 
Scutellum ochreous. Elytra in both sexes very slightly narrowed 
to three-fourths of their length, then abruptly narrowed in a curved 
line to the apex, which is subsinuate-truncate; surface punc- 
tured, except near the apex, dark brownish chestnut ornamented 
with marks of a yellowish-ashy hue; there is a small spot on 
each side of the scutellum, an angulated streak under each 
shoulder, and a large common spot a little before the middle 
extending along the suture both towards the base and apex, and 
connected with an angulated streak which touches the side on 
each elytron ; this patch has a small blackish speck in its mid- 
dle over the suture ; besides these marks, the apex has on each 
side a flexuous streak enclosing a tooth-shaped spot of the 
ground-colour of the elytron. Body beneath hoary white. Legs 
reddish, with ashy pile; apex of thighs, tibie, and tarsi black. 
3d Terminal abdominal segment feebly emarginated at the 
apex. 
2 Ovipositor greatly elongated and exserted beyond its sheath, 
apical dorsal plate of its sheath pointed, ventral deeply cleft. 
I met with this elegantly marked insect only at Obydos, on 
the Guiana side of the Lower Amazons, where it was abundant, 
im March 1859. It has been found also in the interior of 
Cayenne by M. Bar, and exists in French collections under the 
names of Hutrypanus figuratus and E. elegans, the former of 
which I have adopted. 
2. Toroneus suavis, n. sp. 
T. oblongus, convexiusculus, nigro-castaneus, capite thoraceque vitta 
centrali ochracea: elytris litura humerali, fascia obliqua pone 
medium, linea arcuata laterali prope apicem, suturaque postice 
cinereo-ochraceis. Long. 33-53 lin. ¢ @. 
Head dark brown, sides of forehead and cheeks each with a 
yellowish streak, vertex with a broad central yellowish stripe. 
Antenne slender, reddish, tips of joints dusky, bases of third 
to sixth joints pale. Thorax not much broader than the head, 
and with a shght protuberance on each side about the middle, 
but no trace of spine or tubercle ; above dark chestnut, silky, 
sides whitish, the middle traversed by a yellowish stripe con- 
tinuous with that of the head. Scutellum ochreous. Elytra in 
both sexes gradually narrowed from base to apex, the latter 
sinuate-truncate ; surface punctured, except towards the apex, 
dark brownish chestnut ornamented with yellowish-ashy marks ; 
there is a small spot on each side of the scutellum, a patch be- 
neath and a curved line above the shoulder, an oblique stripe 
beginning about the middle of each side, and extending to the 
