426 MR. MARTIN JACOBY ON NEW SPECIES [Nov. 28, 
joints more or less flavous below, the third joint distinctly shorter 
than the fourth; thorax with the sides broadly flattened, the 
anterior angles pointed but not produced, the disc impunctate, 
testaceous, the lateral margins feebly rounded anteriorly; scu- 
tellum black; elytra convex, without basal depressions, with 
narrow reflexed margins, closely and very finely punctured, tes- 
taceous; under side and legs black, the abdomen more or less 
flavous at each side. 
Hab. Peru. 
Very closely allied to O. plebeja Klug, but in that species the 
head is punctured at the vertex and the eyes are margined with 
testaceous, the elytra are more strongly punctured, and the 
“habitat” of the species is Brazil. I have preserved Clark’s 
catalogue name for the present species, of which specimens are 
also contained in the British Museum. 0. obscuripennis Jac., also 
from Peru, is likewise very closely allied, but is a smaller insect, 
of different shape, with the anterior angles of the thorax mucro- 
nate and a much more flattened carina of the clypeus. 
OEDIONYCHIS NIGRIMANA, Sp. Nn. 
Black; thorax short’ and strongly transverse, impunctate ; 
elytra finely punctured, pale greyish-testaceous. 
Length 5 millim. 
Of medially gradually widened shape, moderately convex ; the 
head entirely impunctate, black, the frontal elevations transverse, 
contiguous, carina acute, convex; antennz black, the third and 
fourth joints equal (the rest wanting); thorax short, of equal 
width, more than twice as broad as long, the lateral margins 
rounded, the sides broadly flattened, the anterior angles neither 
thickened nor produced, the surface impunctate, black, very 
shining; scutellum black; elytra gradually widened towards the 
middle, finely and closely punctured, pale greyish-testaceous, 
below and the legs black ; metatarsus moderately short, claw-joint 
very strongly inflated ; prosternum proportionately broad. 
Hab. Peru. 
Of similar coloration to O. turpis Jac., but much smaller, the 
head and thorax entirely black and the elytra without apical 
black spot, 
OEDIONYCHIS ALBIPENNIS Jac. 
Since this species was described (P. Z. 8. 1894, p. 609) I have 
received a good many more specimens from the Amazon regions, 
which prove that the insect is extremely variable in regard to size 
as well as to coloration. The type was described from nearly 
unicolorous specimens; those now before me show the following 
elytral markings :— 
a. Two spots at the basal margin; a longitudinal streak near 
the side, very broad at its commencement, strongly pointed 
at the apex. 
