438 MR. MARTIN JACOBY ON NEW SPECIES [Noy. 28, 
OEDIONYCHIS INFORMIS (MS. Clark), sp. n. 
Testaceous, the head, breast, and abdomen (partly) black ; 
thorax impunctate, scutellum black; elytra minutely punctured 
each with three transverse black bands ; legs testaceous, the apex 
of the posterior femora and the base of the tibie black. 
Length 6 millim. 
Head narrow, dark piceous, impunctate, eyes large; two basal 
joints of the antennee testaceous, the others wanting ; thorax with 
the lateral margins strongly rounded, the sides very broadly 
flattened, anterior angles not produced into a tooth, the dise im- 
punctate, testaceous ; scutellum black; elytra with rather broadly 
reflexed lateral margins, extremely finely and closely punctured, 
testaceous, with three transverse black short bands abbreviated 
at each end, the basal one in shape of a large subquadrate patch 
placed on the shoulders, the second one, the narrowest, placed at 
the middle, and the third near the apex; under side black, the 
last three abdominal segments and the legs testaceous, the extreme 
apex of the posterior femora and the base of their tibie black. 
Hab. Rio de Janeiro. 
OEDIONYCHIS GRAYI, Sp. n. 
Dark fulvous below; clypeus and thorax flavous, base of the 
head black, anterior angles of thorax mucronate, the latter im- 
punctate; elytra very finely and closely punctured, flavous, a 
broad transverse band at the base and another below the middle, 
not extending to the margins, dark violaceous, posterior edge of 
the second band rounded. 
Length 63 millim. 
Head impunctate, the vertex black, frontal tubercles narrowly 
transverse, flavous, as well as the clypeus, labrum, and the palpi ; 
antenne short, not extending to the middle of the elytra, dark 
fulvous, the basal joint thick, subcylindrical, widened at the apex, 
the third joint twice as long as the second but shorter than the 
fourth joint, the following joints about as long as the third; 
thorax narrowed anteriorly, about twice and a half broader than 
long, the sides nearly straight, the lateral sulci not deeply 
separated from the disc, anterior angles mucronate, the surface 
convex, impunctate, flavous; scutellum blackish; elytra rounded 
and widened towards the middle, narrowly margined, the shoulders 
with a short, moderately deep impression within, the surface finely 
but distinctly and very closely punctured, the dark bands very 
wide, the dividing spaces narrow, the lateral margins likewise 
narrowly flavous, the posterior band rounded at its apical 
margin, leaving the suture for a little way upwards and the apex 
of the elytra somewhat more broadly flavous; under side and 
legs fulvous. 
Hab. Amazons (Bates). 
The single specimen contained in my collection was obtained by 
Bates, but bears no special locality. The species differs from 
