1905. | OF PHYTOPHAGOUS COLEOPTERA. 423 
O. navicularis, but is of more elongate and less convex shape and 
is much larger; the thorax is longer and less transverse, 
OBDIONYCHIS ECUADORIENSIS, Sp. 0. 
Broadly ovate, the head, antenne, and the under side black; 
thorax flavous, impunctate; elytra obscure pale fulvous with 
slight purplish shade, extremely finely punctured. 
Length 8 millim. 
Head with a few fine punctures near the eyes, finely granulate, 
black, the frontal elevations pyriform, divided by a deep groove; 
clypeus flavous; eyes very large, but not closely approached ; 
antenne black, the basal three joints more or less testaceous 
above, third joint slightly shorter than the fourth ; thorax with 
strongly rounded and broadly flattened sides, the anterior angles 
acute but scarcely produced, the dise rather convex, flavous, 
impunctate ; scutellum triangular, fulvous ; elytra widened 
towards the middle, with broadly reflexed margins, the latter 
pale; the disc obscure fulvous with a slight purplish tint, very 
finely and closely punctured; under side and legs black or 
piceous; metatarsus very short, claw-joint strongly swollen. 
Hab. “Ecuador. 
This is a species of peculiarly dull appearance, unless this is 
caused by discoloration, The two specimens before me are, how- 
ever, entirely similar in this respect, the shape is rather broadly 
ovate, and the elytral margins are proportionately broad, 
OEDIONYCHIS RHODINA, sp. 0. 
Oblong, nearly parallel, black; thorax rather short, testaceous, 
impunctate, the sides gradually flattened; elytra without promi- 
nent shoulders, testaceous, impunctate. 
Length 7-73 millim. 
Head impunctate, black; frontal tubercles broad, ill-defined ; 
eyes widely separated, with a few punctures placed between them; 
clypeus very short, strongly deflexed ; antennz not extending to 
the middle of the elytra, black, the third and following joints 
equal, terminal joints elongate; thorax rather short, the sides 
rounded anteriorly, the anterior margin concave, anterior angles 
produced into a short, blunt tooth, the disc impunctate, shining, 
testaceous, the sides flattened, but this portion limited within by 
a shallow sulcus only; scutellum more or less piceous at the base; 
elytra slightly wider at the base than the thorax, rather elongate, 
feebly widened only towards the middle, the shoulders but slightly 
prominent and bounded within by a shallow depression only, the 
surface nearly impunctate ; below and the legs black, 
Hab. Espirito Santo, Brazil. 
A rather larger species, and principally differing in the less 
strongly flattened sides of the thorax, the oblong shape of the 
elytra and their less prominent shoulders and almost impunctate 
surface. 
Proc, Zoou, Sec.—1905, Vou. II, No, X XIX, 29 
