186 
9. 
* In O. sculpturatum this character is less strongly developed than in O. tardum. 
BLACKBURN AND SHARP—On some New Species and Genera of Coleoptera. 
. Rostrum regularly arched, or almost straight, and not noticeably dilated at 
the apex, . A a 6 fi 5 ; : A ‘ ‘ ‘ 
Rostrum irregularly or angularly arched, . ° 3 5 ° C 
Rostrum strongly dilated at apex (a large species with long antenne and 
legs, ovate in form, the elytra almost vertical behind, bearing rows of 
punctures, and obscurely striate near the apex), a 3 0 5 
. Rostrum distinctly punctured, 
Rostrum not distinctly punctured (a small, narrow, elongate insect, with the 
elytra scarcely striate, and the punctuation very confused), 
. Elytra not distinctly striated (at least not in the anterior portion), 
Elytra distinctly striated throughout (a species of medium size and oblong- 
ovate form, very shining, with stout legs and antenne), . ‘ : 
. Species of narrow, elongate form, with the elytra regularly curved on the 
sides, and not becoming, close to their base, abruptly wider than the 
thorax, . ‘ 3 0 A ° . é f : . . 
Form wide ovate, elytra bi-sinuate (¢. e. with the sides much more strongly 
rounded in front than behind, and consequently abruptly dilated im- 
mediately behind the thorax). [A species of medium or small size, 
oval in form, very shining, elytra obscurely striated, the striz strongly 
punctured], . ; : : 0 2 c : : . , 
3. Shining species, with eyes somewhat convex, . : : , 
Surface much less shining than usual in the genus, with the eyes very 
depressed (a large, oblong-oval species, elytra very obscurely striated, 
with rows of strong punctures), . < ° 9 ‘ : c 5 
The larger punctures on the elytra rather closely ranged in very distinct 
rows (a rather small, brilliantly-shining species ; narrow, elongate ; 
elytra hardly striated, interstices very distinctly punctured), . a 
Rows of punctures on the elytra very obscure (a small, oblong species, with 
stout legs and antenne), 
Elytra not shining, with no distinct punctuation, except rows of very large 
punctures (a large species of ovate, almost subquadrate, form), . 
Elytra very shining, with rows of moderately large punctures, and inter- 
stices more finely punctured (a rather large species of oblong-ovate 
form), 
Elytra gently sloped off behind; rostrum not abruptly bent near the middle, 
Elytra almost vertical behind; rostrum abruptly bent a little in front of 
the middle (a large, brilliantly-shining species of elongate-oval form, 
acuminate behind, with long rostrum, long, slender antennz, very 
stout legs, and elytra margined along the base), 
3. 
8. 
O. nivicola. 
O. angustum. 
O. robustum. 
O. obscurum. 
O. borrei. 
jo) 
. halticoides. 
O. crassicorne. 
O. sculpturatum. 
O. tardum. 
10. 
O. olinde. + 
+ This species might not unreasonably, I think, be regarded as the type of a new genus. In some 
respects it seems to approach Heteramphus. 
