OTOCERUS. 381 
b. Anterior trochanters produced into a sharp curved tooth in the male. Elytra 
unicolorous. 
5. Otocerus hamatus. (Tab. XVI. fig. 22, 3.) 
Elongate ovate, moderately convex, dull brownish-bronze or reddish-brown. Head finely and closely punctured 
in front, much more coarsely so behind, feebly impressed between the eyes, the anterior half and the oral 
organs reddish-brown ; eyes large, approximate in the male, narrowly separated in the female; antenne 
slender in both sexes—in the male moderately long, joints 4-10 a little dilated at their inner apical angle, 
3 very short, 4 nearly twice as long as 3, 5—7 subequal, 8-10 decreasing slightly in length and much longer 
than broad, 11 as long as 10 and bluntly rounded at the apex—in the female shorter, joints 4-10 not 
extended at their inner apical angle, 11 oblong ovate—ferruginous or fusco-ferruginous ; prothorax trans- 
verse, slightly convex, the sides immarginate, angularly dilated on each side in the middle and there armed 
with a short tooth, and thence to the base and apex obliquely converging, a little more narrowed in front 
than behind, the apex nearly straight, the base feebly bisinuate, the anterior angles rather prominent, the 
hind angles subrectangular, the disc a little flattened, shallowly canaliculate, and broadly transversely 
depressed behind, the basal fovee large but not deep, the surface rather uneven, coarsely, shallowly, and 
closely punctured, the punctures here and there confluent ; scutellum scutiform, rather closely punctured ; 
elytra comparatively rather short, subparallel in their basal third, coarsely crenate-striate, more finely so 
towards the apex, the interstices smooth and convex throughout, the surface rather more shining than 
that of the head and prothorax; beneath dull reddish-brown, finely, shallowly, and sparingly punctured, 
the sides of the metasternum and the flanks of the prothorax coarsely and shallowly so; pro- and 
mesosternum broad, the former depressed in the middle between the coxe and declivous behind; legs 
slender, very closely and somewhat coarsely punctured, the basal half of the femora very much smoother, 
more or less ferruginous, the femora usually stained with piceous; the first joint of the posterior tarsi 
very long, about half as long again as the apical joint ; the anterior trochanters produced into a fine sharp 
slightly curved tooth, the anterior tibie very slightly curved and sinuous (as in the female), and the fifth 
ventral segment broadly and shallowly depressed in the middle, in the male. 
Length 104-12 millim.; breadth 33-4 millim. (¢ 9.) 
Hab. Nicaragua, Chontales (Belt, Janson). 
Many specimens. 0. hamatus is readily identified by the dull brownish-bronze 
surface, the elongate-ovate shape, the comparatively slender antenne, the shape and 
sculpture of the thorax, the somewhat coarsely crenate-striate elytra, and the convex 
interstices; and also by the sharply-toothed anterior trochanters in the male. 
2. Eyes much smaller, widely separated. 
+ Elytra pointed at. the apex, moderately long ; upper surface bronze. 
6. Otocerus microps. (Lab. XVI. fig. 23.) 
Moderately elongate, rather convex, greenish-bronze, shining. Head rather coarsely, closely, and irregularly 
punctured, the epistoma much more finely so, the latter transversely impressed in the middle behind, the 
vertex longitudinally grooved in the middle, the groove extending to the epistoma ; eyes small, widely 
separated ; antenn stout, rather short, much widened outwardly, joints 4-10 flattened, 4 much longer 
and wider than 3, 5-10 each much shorter than 4, nearly equal in length, and about as broad as long, 
11 ovate, bluntly rounded at the apex, the joints brownish-piceous, «neous towards the base ;_ prothorax 
transverse, subquadrate, convex, but a little flattened on the middle of the disc, the sides almost straight 
behind, slightly sinuate immediately before the subacute hind angles, very gradually and obliquely con- 
verging from the middle to the apex, with a short blunt median tooth, and from the tooth to the rounded 
