548 Mr. Waterhoug#on some South American 
sinuate on each side beyond the middle, 6+ millimetres 
long, very densely but almost imperceptibly punctured. 
Elytra densely and excessively finely punctured, the 
punctures appearing in some lights elongate, and inter- 
mixed with this are some rather stronger punctures ; on 
each elytron four obscurely impressed lines may be 
traced ; the margin below the shoulder is slightly in- 
crassate. Pygidium strongly and moderately closely 
vermiculate-striolate. The sides of the metasternum 
and the base of its epimera are similarly striolate, but 
less strongly so; the sides of the abdomen are still less 
strongly striolate ; the apical portion of the epimera is 
not very thickly punctured. Sternal process very long, 
eradually narrowing to the apex, slightly curved over the 
anterior coxe. Body beneath and the femora almost 
destitute of any pubescence. 
Hab. Brazil ? 
5. Thyridium cyanipes, n. 8. 
Obovatum, convexum, nitidum, viridi-prasinum ; tho- 
race angustiori, corpore subtus pedibusque cyaneis. 
Long. 113 lin. 
Head sparingly punctured ; clypeus coarsely rugulose ; 
its anterior margin only slightly arcuate, the front 
portion (as well as the mouth and antennz) nearly black. 
Thorax 73 millimetres long, 113 millimetres broad at the 
widest part, scarcely narrowed posteriorly, gradually 
narrowed anteriorly from rather behind the middle ; very 
delicately and moderately thickly punctured ; just within 
the incrassated margin the surface is finely rugulose ; the 
anterior angles rather prominent and acute, the sides 
(viewed from above) not angular, but arcuate; the base 
in the middle broadly and very gently and arcuately 
lobed, with a slight sinuosity on each side of the lobe. 
Scutellum a curvilinear triangle, 3 millimetres long, 
4 millimetres broad. Elytra rather thickly and very 
evidently punctured, the punctures elongate when viewed 
in certain lights; sutural stria distinct; the margin 
below the shoulders is slightly incrassate (or perhaps 
rather turned under). Pygidium smooth in the middle 
of the base, vermiculate round the margins and sides, 
which are beset with long pale hairs. Sternal process 
long and very thick, a little enlarged at the apex, the 
apical angle bent over the anterior coxe. Sides of the 
