1905. | OF PHYTOPHAGOUS COLEOPTERA. 445 
times slightly concave near the suture, both bands do not quite 
extend to the lateral margins of the elytra; under side and legs 
black, the apex of the abdomen sometimes more or less fulvous ; 
prosternum longitudinally carinate at the middle. 
Hab. Peru. 
The characteristic feature of this species, by which it may 
be principally distinguished from the many similarly coloured 
ones, is the shape of the elytral blue posterior band, of which the 
posterior edge is broadly rounded instead of straight; the flavous 
band which separates the blue ones at the middle is generally, but 
not always, of about the same width as that of the basal dark 
band, sometimes broader. O. alacris Erich. and O. promta Erich. 
are described with black not blue bands, and the former with 
the head rufous, the other with a broad median flavous band ; 
other details are not given. ‘The eight specimens before me show 
no variation of any importance, but I may add that the posterior 
elytral band is in all cases broader (in a longitudinal sense) than 
the anterior one. 
OEDIONYCHIS COLOMBIANA, Sp. Nn. 
Black, the clypeus and the thorax flavous, the latter impunctate ; 
elytra with a few punctures near the base, flavous, a broad band at 
the base, another at the middle, and the extreme apex metallic 
blue; abdomen fulvous. 
Length 7 millim. 
Head bluish black, impunctate, frontal elevations small, trans- 
verse, clypeus flavous, carina short and thick; antenne with the 
lower and the terminal three joints dark fulvous, the intermediate 
ones piceous, third joint much shorter than the fourth; thorax 
impunctate, flavous, the sides deeply sulcate, especially so near the 
anterior angles which are thickened but not produced, near the 
base is a very shallow transverse sulcation; scutellum black; 
elytra extremely finely punctured, with some more distinct 
punctures near the suture and within the shoulders, flavous, a 
broad transverse band at the base, not extending downwards to 
the middle nor to the lateral margins, another band immediately 
below the middle but of more rounded shape, and the extreme 
apex metallic blue; breast and legs black, the abdomen and the 
tarsi more or less fulvous. 
Hab. Colombia. (Collection H. Clavareau and my own.) 
Closely allied to O. bipunctata Chev. (insularis Jac.), but the 
head impunctate, the frontal elevations black, not flavous, and the 
elytra extremely finely punctured, the posterior band broader, 
not in shape of a round spot. 
OEDIONYCHIS SUCCINCTA, sp. 1. 
Black, antenne fulvous; thorax flavous, with an eneous short 
band at the middle of the anterior margin; elytra flavous, a 
broad transverse band at the base and another below the middle 
black, nearly impunctate. 
