WICKHAM: FOSSIL ELATERIDAE or FLORISSANT. 501 



not shown. Length, from front of head to elytral apex, 5.60 mm.; 

 of elytron, 3.60 mm. 



Described from one specimen. 



Type. In the Museum of the University of Colorado. It was col- 

 lected by Mrs. W. P. Cockerell at Station 14, Florissant, Colo. 



In general, this beetle is a good deal like the preceding, but is smaller 

 and has very differently shaped elytra. 



ELATERINAE. 



LACON EXHUMATUS, sp. nov. 

 Plate 1, fig. 6, 7. 



Form stout. As the specimen shows the underside only, no details 

 of the sculpture of the upper surface can be given. Antennae with 

 only the middle portion well preserved, joints stout, moderately 

 serrate. Prothorax beneath punctured on the flanks but not very 

 closely nor strongly, prosternum somewhat smoother, lobe short, 

 blunt, sutures curved, excavate, more deeply in front. Elytra, as 

 shown from below, merely indicating that they were marked with 

 rows of coarse punctures. Abdominal punctuation obscure. Length, 

 from front of head to elytral apex, 7.75 mm.; of elytron, about 5.00 

 mm., the base being too obscure to locate exactly. 



Described from one specimen. 



Type. No. 2,776 M. C. Z. Florissant, Colo. (No. 4,456 S. H. 

 Scudder Coll.)? 



This insect has the look of Lacon and agrees in the structure of the 

 underside of the prothorax, the short antennae and the elytral sculp- 

 ture. It is smaller than the average recent L. rectangular is, wide- 

 spread in North America, but is just the same size as some southern 

 specimens in my collection, 

 i 



CARDIOPHORUS LITHOGRAPHUS, sp. nov. 

 Plate 2, fig. 1-3. 



Form moderately stout. Head not well preserved, very minutely 

 punctulate. Prothorax nearly equal in length and breadth, apex 

 narrower than base, sides rather faintly arcuate, hind angles acute 



