WICKHAM: FOSSIL ELATERIDAE OF FLORISSANT. 509 
all of the species of Monocrepidius that I know are more strongly 
striate and somewhat differently proportioned. 
ELATER ROHWERI, sp. nov. 
Plate 3, fig. 5, 6. 
Form moderately elongate. Head rather short, distinctly but 
finely punctured, somewhat sparsely on the sides and still more finely 
and sparsely on the vertex, minutely hairy. Antennae quite slender, 
scarcely at all serrate, not reaching the tips of the prothoracic hind 
angles, basal joint large, second and third not well defined, the re- 
mainder subequal, all finely hairy. Prothorax strongly narrowed 
anteriorly, front margin arcuately emarginate, anterior angles not 
very prominent, sides moderately arcuate, hind angles long, sharp, 
a little divergent with distinct discal carina and possibly with an 
external marginal one as well. The base is a little emarginate in 
front of the scutellum. Thoracic disk with a well-impressed, smooth 
median line on basal one fifth, the middle area finely and sparsely, 
sides more strongly and closely punctate, entire surface hairy. Scutel- 
lum oblong, punctured and hairy. Elytra bluntly pointed, tapering, 
striae not deep, with rows of slightly elongate, rather fine punctures 
separated in general by ‘about their own long diameters, interstitial 
spaces broad, flat, hairy, but not punctured excepting the small 
depressions from which the hairs arise. Legs of moderate length, 
finely hairy. Underside of body with most of the details not well 
defined, but the prothoracic side-pieces are fairly strongly though not 
densely nor coarsely punctured, the prosternum more finely. The 
spine is pointed, the lobe broken at tip but apparently not long, the 
sutures double, excavated, the metacoxal plates broad internally, 
the abdomen finely hairy, scarcely punctulate. Length, from front 
of head to elytral apex, 7.60 mm.; of elytron, 5.00 mm. 
Described from one specimen, with counterpart. 
Type.— In the Museum of the University of Colorado. Florissant, 
Colo., collected at Station 14 by Professor Cockerell and bearing 
his numbers 192 and 211. 
The general features of this beetle point to Elater as a fairly exact 
reference. It is most like some of the less strongly sculptured modern 
North American species, such as E. sanguinipennis or E. behrenst, 
but is rather smaller. Compared with the fossil FE. scudderi, the 
