WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 401 
OLIGOMERUS FLORISSANTENSIS, sp. nov. 
Plate 6, fig. 2. 
Form elongate, rather slender. Head of moderate size, minutely 
and closely punctulate, eye not defined, antennae wanting. Pro- 
notum, in side view, subcuneiform, finely punctulate. Elytron long, 
very finely sculptured but with well-defined, sharp though narrow 
punctate striae, the punctures small, well impressed, longitudinally 
elliptical, those of the same row separated individually by something 
less than their own long diameters. Leg (only one being at all well 
shown), short and rather slender. Length, from front margin of 
pronotum to elytral apex, 4 mm. 
Described from one specimen. 
Type.— No. 2,523 M. C. Z. Florissant, Col. (No. 5,921 S. H. 
Scudder Coll.). ; 
In size and outline, this beetle is about like Hrnobius effetus, so 
similar in fact that allowing for the difference in thoracic outline which 
might be due to distortion I should have considered them as repre- 
senting one species if it were not for the well-defined punctate striae 
of the elytra of the present insect. The nearly semicircular structure 
projecting on to the head near the anterior prothoracic margin seems 
to be not an eye but probably due to some imperfection in the stone. 
Of course the generic reference cannot be made with any great degree 
of certainty, but the fossil is not unlike the modern O. obtusus of east- 
ern North America. 
OLIGOMERUS (?) DURATUS, sp. nov. 
Plate 6, fig. 3. 
Form elongate. Head large, minutely punctulate and rugulose. 
Eye of moderate size, elliptical. Antennae wanting. Prothorax 
short, subcuneiform in side view, back scarcely arched, front margin 
apparently but little or not at all projecting, surface finely punctate 
but somewhat more coarsely than the head. Elytron long, the outer 
edge broken so that the relative proportions of length and breadth 
cannot be determined with exactitude, surface with faint evidence of 
obtuse costation or striation, punctuation very fine and confused. 
Underside of body minutely punctulate, more strongly on the thorax 
than on the abdomen. Legs short and slender. Length, 4.25 mm. 
