46 Mr. H. W. Bates on the Longicorn Coleoptera 
face densely clothed with short, erect, black bristles, some of 
which arise from a little tuft of shorter bristles; moderately 
punctured ; centro-basal tubercles surmounted each by a rather 
long pencil of hairs: the colour is blackish brown, with a few 
tawny specks; behind the middle is a short transverse ash- 
coloured line crossing the suture (in some examples almost 
obliterated), and close to the apex on each side is a triangular 
velvety-black spot, notched on its inner side and margined with 
ashy, the sutural space between the spots being sometimes 
wholly ash-coloured. Body beneath and legs tawny ashy, 
sprinkled with black; middle of abdomen black, with edges of 
segments tawny. The legs are stout; the thighs clavate, the 
basal joint of the tarsi fully equal ini length to the two following 
taken together. 
3 The apical ventral segment in the male is semicircularly 
notched, the dorsal segment briefly and obtusely notched. 
2 The apical dorsal segment in the female is much elongated, 
lanceolate and acute, but not keeled above; the ventral segment 
semitubular and truncated at the tip. 
Ega and 8. Paulo, Upper Amazons, on dead branches in the 
forest. I have a specimen also from the interior of French 
Guiana, collected by M. Bar. 
Genus ATRYPANIUS, noy. gen. 
Body oblong-oval or elliptical, convex. Head with the front 
elongated ; eyes oblong. Antenne not much longer than the 
body, and nearly naked. Thorax as in Trypanidius—namely, 
slightly uneven on the surface, widening from the front to the 
tips of the lateral spines—which are short, conical, and acute, 
not curved posteriorly, and placed not much after the middle of 
the thorax. Elytra with centro-basal ridges not conspicuous ; 
obtuse at the tip, naked. Feet very stout; thighs strongly 
-clavate ; basal joint of the tarsi short, scarcely longer than the 
second. Mesosternum simple. Dorsal and ventral plates of the 
apical abdominal segment obtuse in the male: ovipositor in the 
female very short, scarcely apparent beyond the tips of the 
*elytra, the dorsal plate broadly rounded at the tip, the ventral 
truncated. 
The present genus is founded on Lamia conspersa of Germar, 
a species which differs from all the allied genera, except Trypa- 
nidius, in the shortness of the basal joint of the tarsi. The ob- 
tuseness of the apical abdominal segment in both sexes, the 
shortness of the ovipositor in the female, and the elongation of 
the eyes and forehead, also distinguish it from most of the groups 
to which it is in other respects most nearly related. It differs 
from. Trypanidius (besides the elongation of the eyes) in the 
