882 HETEROMERA. 
(but rather prominent) anterior angles finely margined (the margin not visible from above), the base feebly 
bisinuate, the apex nearly straight, the basal fovese narrow, the disc canaliculate and irregularly depressed 
on each side about the middle, the surface very irregularly, somewhat coarsely, and moderately closely 
punctured, more sparingly so on the disc; scutellum triangular, sparingly punctured ; elytra conver, 
moderately long, widest at the base, the humeri rather prominent and impressed within, subparallel in 
their basal third, rapidly narrowing from the middle to the apex, the apices a little divergent and sub- 
mucronate, rather coarsely punctatc-striate, the punctures becoming finer towards the apex and oblong in 
shape, the interstices smooth and feebly convex throughout; beneath more shining, greenish-bronze, the 
ventral segments 1-4 sparingly, subequally, and somewhat finely, but deeply, punctured, the fifth segment 
much more coarsely so, the sides of the metasternum and the flanks of the prothorax very coarsely 
punctured ; legs moderately Jong, the femora shallowly and rather finely, the tibize more coarsely, punc- 
tured, greenish-eneous, the tarsi dark violaceous; the first joint of the posterior tarsi long, about as long 
as the apical joint ; the tibiw slightly curved, the anterior pair a little sinuous. 
Length 12 millim. ; breadth 34 millim. 
Hab. Nicaracua, Chontales (Belt). 
One example, apparently a male. This species has quite a different facies from its 
allies; it is easily identified by the elytra being narrowed from a little below the base 
and submucronate at the apex, the canaliculate head and thorax, the small eyes, &c. 
TT Llytra rounded at the apex, short ; upper surface violaceous. 
7. Otocerus impressipennis, (Tab. XVI. fig. 24, 2.) 
Oblong ovate, rather broad, moderately convex, bright violaceous. Head closely and somewhat coarsely punc- 
tured, the punctures more irregular and here and there confluent between the eyes, the latter compara- 
tively small and widely separated in both sexes; antenne moderately long and stout, very little shorter 
in the female, the third joint much shorter than the fourth, joints 4-10 angularly produced at their inner 
apical angle and rather broadly flattened, still broader in the female (7 and 8 the widest) and all longer 
than broad, the apical joint narrower and ovate, the latter more or less ferruginous, the rest violaceous or 
cyaneous ; prothorax broad, strongly transverse, convex, the sides subangularly dilated in the middle and 
there armed with a short tubercle, narrowly but completely margined (the margin in part visible from 
above), strongly narrowed and rounded in front, and almost straight or feebly narrowed behind, the apex 
nearly straight, the base slightly sinuate, both very strongly margined, the anterior angles deflexed and 
broadly rounded, the hind angles subrectangular, the disc deeply transversely impressed before the base, 
and usually with a shallow irregular fovea on each side about or a little before the middle, between 
which and the lateral margin (in some examples) is a long transverse impression, the basal foves deep 
and oblique, the surface finely and sparingly punctured; scutellum large, triangular, finely punctured ; 
elytra comparatively short and broad, subparallel in their basal half, thence rapidly rounded and converging 
to the apex, the humeri prominent and impressed within, finely punctate-striate, the strise interrupted 
before the middle by a strong transverse or oblique elevation extending from the second to the sixth 
interstices, the elevation bifurcate laterally (with the lower ramification extending to the eighth interstice) 
and limited before and behind by a deep transverse or oblique impression, the interstices feebly convex 
about the middle and flat beyond, and finely and sparingly but quite distinctly punctured, the epipleuree 
extending rather broadly to the apex ; beneath bright cyaneous, almost smooth, the fifth ventral segment, 
the metasternum and side-pieces, and the flanks of the prothorax with scattered moderately coarse 
impressions ; legs moderately long, sparingly punctured, violaceous, the first joint of the posterior tarsi 
longer than the apical joint ; anterior tibie slightly curved in the male, the fifth ventral segment unim- 
pressed in this sex. 
Length 10-117 millim. : breadth 33-41 millim. (¢ @.) 
Hab. Panama, Bugaba 1000 feet (Champion, Trétsch). 
