450 MR. MARTIN JACOBY ON NEW SPECIES [ Nov. 28, 
scutellum black; elytra of elongate shape, minutely and obsoletely 
punctured, flavous ; the suture and a discoidal longitudinal stripe, 
both abbreviated near the apex, black; under side obscure blackish, 
the legs dark fulvous, the tibie rather darker, prosternum pale. 
Hab. Tasco, Mexico. 
Of this species, one of the most elongated of the genus, I 
received a single specimen from M. Donckier of Paris; the 
elytral sutural stripe is of narrower shape than the discoidal one. 
Elytra blue or black, with flavous lateral and apical margins. 
OEDIONYCHIS CINCTIPENNIS, sp. nh. 
The head, breast, and legs black; thorax fulvous, impunctate ; 
elytra convex, widened posteriorly, metallic blue, closely and 
distinctly punctured, the lateral and apical margins fulvous; 
abdomen partly flavous. 
Length 7 millim. 
Strongly convex and widened posteriorly; the head black with 
bluish gloss, with a few punctures near the eyes; antennz black, 
the lower three joints fulvous below, third and fourth joints equal ; 
thorax with the lateral margins strongly rounded anteriorly, the 
sides broadly flattened, the dise convex, impunctate, fulvous ; 
scutellum black; elytra widened below the middle, with a short 
but deep depression within the shoulders, very closely and rather 
strongly punctured, metallic blue, the lateral margins narrowly 
and the apex rather more broadly so, fulvous; under side and legs 
black, the sides of the abdomen more or less fulvous or flavous. 
Hab. Peru. 
From other similarly coloured species, the present one is dis- 
tinguished by the posteriorly widened shape and the distinct and 
close punctuation of the elytra; the latter have in some specimens 
a very small fulvous spot placed near the suture at the middle, 
the fulvous margin widens slightly and gradually near the apex, 
the latter part is also entire, not serrulate as in O. sagulata 
Krichs. 
OEDIONYCHIS PALLIDICINCTA, Sp. Nn. 
Obscure piceous below, the thorax and legs flavous; tibiz and 
tarsi and the apex of the posterior femora black ; thorax impunc- 
tate; elytra black, entirely impunctate, the extreme lateral and 
the apical margins more broadly, flavous. 
Length 53 millim. 
Of rather flattened shape; the head nearly black, impunctate, 
deeply transversely grooved between the eyes, the latter very 
large, frontal elevations broad, transverse; antenne rather 
robust, black, the lower two joints and the last one fulvous, 
third and fourth joints equal; thorax twice as broad as long, the 
sides rather rounded, deeply suleate, with strongly reflexed and 
thickened margins, the anterior angles not produced, the surface 
