1905. | OF PHYTOPHAGOUS COLEOPTERA, 435 
slender and slightly longer than the fourth, the following joints 
thickened ; thorax strongly transverse, the sides rounded, broadly 
flattened, anterior angles mucronate. the surface with a few minute 
punctures, testaceous, with three small black spots placed trans- 
versely; scutellum black; elytra with strongly but narrowly 
reflexed margins, rather strongly and very closely punctured, with 
a very feeble depression below the base, black, each elytron with 
six round flavous spots—of these, one is placed at the middle, just 
below the basal margin, two at the middle, placed transversely, 
two immediately below, and one at the apex; under side and legs 
black. 
flab. Paraguay. 
A rather small and well-marked species, of which I possess a 
single specimen only. 
Hlytra with elongate spots or longitudinal black or 
Jlavous bands. 
OEDIONYCHIS HUMBOLDTI, sp. n. 
Testaceous, the head and the breast black, sides of the thorax 
straight, the latter impunctate; elytra closely and finely punctured, 
two elongate spots at the base and two below the middle of each 
elytron black, 
Length 6 millim. 
Head black or nearly so, impunctate, the frontal elevations 
broad, trigonate, clypeus perpendicularly deflexed ; antennee 
robust, fulvous, the third joint smaller than the fourth; thorax 
narrowed in front, one-half broader than long, the sides straight, 
broadly flattened, the anterior angles produced into a small tooth, 
the surface impunctate, testaceous ; scutellum testaceous; elytra 
nearly parallel, closely and distinctly, although finely punctured, 
testaceous, each elytron with two more or less elongate black spots 
at the base and two others below the middle—of the basal spots, 
one is placed on the shoulders and extends nearly down to the 
middle, the other shorter one is placed near the suture; the 
posterior spots are almost joined, the outer one being of more 
elongate shape than the mner; under side and legs testaceous, 
breast black. 
Hab. Bolivia. 
This Oedionychis is well distinguished by the straight lateral 
margins of the thorax, which are obliquely narrowed anteriorly, 
and by the four elytral spots. In one specimen the latter are 
represented by short and narrow stripes. 
OEDIONYCHIS WATERHOUSEI (MS, Clark), sp. n. 
Black, the clypeus flavous; head strongly punctured; thorax 
flavous, impunctate; elytra finely and closely punctured, bluish 
black, the lateral margins narrowly and a broad discoidal band, 
joined at the apex to the margin, flavous. 
Length 6 millim. 
