1905. | OF PHYTOPHAGOUS COLEOPTERA. 431 
OEDIONYCHIS CENTROMACULATA, sp. n. (Plate XV. fig. 2.) 
Testaceous or fulvous; antenne (the apical joints excepted) 
black; thorax impunctate ; elytra minutely punctured, a trans- 
verse band at the base, another below the middle, obscure fulvous, 
the intermediate space with four small black spots. 
Length 6—7 millim. 
Head impunctate, with a deep fovea between the eyes, the 
latter large, closely approached ; antenne black, the lower three 
or four and the apical two joints fulvous, third and fourth joints 
equal, the following joints rather shorter; thorax with rather 
strongly rounded sides, the latter broadly flattened, anterior angles 
mucronate, the dise impunctate, obscure fulvous ; elytra widened 
at the middle, distinctly margined, extremely finely punctured at 
the base, fulvous, this colour divided at the middle by a narrow 
testaceous transverse band in which four black spots are placed 
transversely ; under side and legs testaceous ; prosternum in the 
male strongly convex anteriorly. 
Hab. St. Catharina, Brazil. 
Quite distinct in its system of coloration from any other species. 
Two specimens are before me. 
OEDIONYCHIS ARCUATOFASCIATA, sp. n. (Plate XV. fig. 7.) 
Ovate, subdepressed, greenish testaceous; thorax impunctate, 
with rounded sides; elytra scarcely perceptibly punctured, the 
basal margin, a narrow semicircular band at the base, a spot at 
the lateral and another near the sutural margins below the middle, 
black. 
Length 5 millim, 
Head impunctate, eyes large, frontal tubercles subquadrate, 
short, carina acute; antenne extending to the middle of the 
elytra, testaceous, the third and fourth joints equal, terminal joint 
rather more robust ; thorax quite twice as broad as long, of equal 
width, the sides moderately rounded, the lateral sulci deep, rather 
narrow, the base with another obsolete transverse groove, the 
surface impunctate ; scutellum black ; elytra widened towards the 
middle, rather flattened, pale greenish testaceous, with a few 
minute punctures (only visible under a strong lens), the extreme 
basal margin as far as the shoulders and a transverse semicircular 
narrow band below the base black; this band extends upwards 
along the suture to the scutellum, it is suddenly constricted at its 
middle and does not extend to the lateral margins, near the latter 
is another black spot, below the middle and a little lower a second 
one is placed near the suture ; under side and legs testaceous. 
Hab. Chilpancingo, Mexico. 
I formerly looked upon this species as a variety of O. 13-macu- 
lata Jac., but a further careful examination has convinced me that 
it really represents another form, as the colour of the antenne, 
shape and number of the elytral spots are different and exactly 
similar in the two specimens before me; this species is also of a 
less rounded and smaller shape. 
