Goleopterological Notices, VII. 495 



Elytra more inflated, and rounded at the sides, % wider than the pro- 

 thorax 21uteus 



Elytra each with a single much larger basal excavation ; pubescence less de- 

 cumbent, stiffer and not intermingled with erect setse on the elytra ; body 

 stouter, the head relatively smaller 3 atomus 



No representative of this genus has been taken very far west of 

 the Mississippi, as far as known to me, and it extends thence to 

 the Atlantic Ocean both north and south. 



1. O. miselliis Lee. — Proc. Acad. Nat. Sci., Phila., 1852, p. 155 (Scyd- 



maenus). 



Narrow, subparallel, moderately convex, polished, the head and 

 pronotum sparsely, finely and feebly punctulate, the elytra im- 

 punctate; body pale ferruginous throughout, the legs and an. 

 tennse flavescent ; pubescence very short, even and decumbent, fine 

 pale in color and inconspicuous. Head wider than long, the base 

 truncate with the hairs somewhat longer and more bristling ; tem- 

 poral angles right but rounded ; eyes rather small, at full}'^ their 

 own length from the base; antennal prominences small, rounded, 

 quite conspicuous. Antennae slender, the club distinct and 3- 

 jointed ; two basal joints larger as usual. Prothorax obovoidal, 

 as long as wide, widest and more strongly rounded at apicai third, 

 the sides thence moderately convergent and broadly arcuate to 

 the base, ^ wider than the head ; basal angles obtuse ; disk evenly 

 and moderatel}'^ convex, with two minute fovese at the middle sepa- 

 rated by more than ^ the width and connected by an anteriorly 

 arcuate channel, also with a small fovea at each side near the 

 basal angles in the same transverse line. Elytra oblong-oval, 

 only moderately convex, not connate, evenly and obtusely 

 rounded behind, ^ longer than wide, only just visibly more than 

 twice as long as the prothorax and scarcely ^ wider ; sides broadly 

 arcuate, just perceptibly more prominent near the middle, the 

 humeri slightly evident ; suture not modified. Legs very short, 

 stout, the femora rather strongly clavate but short. Length 0.6 

 mm.; width 0.21 mm. 



Georgia and Louisiana The species described by Brendel 

 under the name Scydmsenus minimus, is perhaps not different 

 from this ; it is the smallest species of the family known to me. 



2. O. luteus n. sp. — Elongate, narrowly suboval, rather convex, polished, 

 sparingly clothed with very short, fine and decumbent whitish hairs, uni- 

 formly distributed throughout, with a few short and stiff erect setse on the 



