76 
INSEGTA SAUNDERSIANA. 
Latit. hum. 2 lin. = 4-^ millim. 
Patria: N . . . . (probabiliter e Cayenna).—Dom. Dupont, Mus. Jekel .* 
Very nearly allied to Tribotropis ( Eciatotropis) conicollis , Jekel, but the 
rostrum is much narrower at the base, its three ridges are evident, and its 
lateral part between the eye and the antennal groove is hardly rugulose. 
The head is less convex and narrowed (proportionally) between the eyes, 
the forehead (front) being hardly narrower than the rostrum, and the eyes 
encroach less on it; these are smaller and less convex. The thorax is 
nearly shaped the same, but is proportionally a little more elongate, being 
evidently (though slightly) longer than broad at the angles of the carina 
(in the female under examination); this is less raised and more broadly 
parallel to the base, its straight part running nearly to the perpendicular 
level of the posterior angles, whilst it begins to run obliquely upwards 
before that level in Tr. conicollis. The scutellum is larger, subcircular 
and similarly clothed. The elytra are more roundly truncate at the base, 
their margin ceases at the angles of the thorax, and from thence they are 
slightly obliquely dilated for the shoulders—which are callose in that spe¬ 
cies—where they are somewhat broader than the thorax ; their sides are ? 
although slightly, evidently dilated to two-thirds of their length (perhaps 
less so in the male), thence obliquely roundly narrowed towards the apex, 
which is more widely and shallowly emarginate, with the sutural angle 
scarcely spiniform: they are narrowly but more deeply depressed along 
the suture, which is more evidently raised (a character nearly obso¬ 
lete in Tr. conicollis ), especially posteriorly; the dorsal elevated part cir¬ 
cumscribing the depression is more abrupt, subcostiform, placed inside of 
the third stria (being outside of it and less elevated in Tr. conicollis ) ; they 
are more convex laterally, and more circularly and obliquely slanting pos¬ 
teriorly, with their ante-apical callosity slightly prominent when looked at 
from the sides in profile, hardly breaking the outline of the circular 
declivity. The pygidium is more convex and deflexed at the apex. 
Obs. —The general tomeotosity, which is of a cinerascent yellowish 
hue, lighter underneath, is formed of a much thicker and looser material 
not silky underneath and on the thighs; on the thorax it is mixed with 
1 This species, though not in the collection of Mr. Saunders, I 
describe for corroborating the genus. 
