490 TERTIARY INSECTS OP NORTH AMERICA. 



are regularly convex, and the striae not suddenly impressed at base. The 

 remains consist of an impression with a small portion of the substance of 

 both elytra in position, slightly separated at base by pressure so that a 

 deceptive appearance of an elongate scutellum is presented ; also the 

 impression of the abdominal segments with a small portion of chitlnous 

 substance. 



" There is also the substance remaining of the greater portion of an 

 elytron which probably belongs to the same species, in which the intervals 

 are moderately convex and with traces of a few punctures, the striae being 

 moderately impressed and not punctured." Horn, loc. cit. 



The elytra have seven feeble and dull striae ; the surface of the single 

 elytron, which agrees altogether in size with the pair, is black and smooth, 

 but faintly wrinkled transversely. Four segments of the abdomen are 

 shown 



Length of one of the pair of elytra, 11°"" ; breadth of same, 5°"". 



Bone caves of Port Kennedy, Pennsylvania. 



CHCERIDIUM Lepelletier-Serville. 

 Chceridium! ebeninum. 



PI. 1, Figs. 18-22. 

 Chtxridlumf ebeninum Horn, Trans. Amer. Ent. Soc, V, 244-245 (1876). 



" The remains for which the above name is suggested, consist of the 

 greater portion of the thorax, the two elytra in a fair state of preservation 

 and a portion of the abdominal segments. These may be described as fol- 

 lows : 



" Thorax nearly twice as wide as long, sides feebly arcuate, gradually 

 converging anteriorly, surface sparsely and finely punctate, pleurag longi- 

 tudinall}^ finely strigose. Elytra rather wider, conjointly, than long, sides 

 moderately arcuate and gradually narrowed to apex, disk with seven mod- 

 erately impressed striae, the outer rather distant from the margin ; stria? 

 entire and nearly parallel and equidistant. Intervals coarsely but sparsely 

 punctured. Epipleura? sparsely punctate. Abdomen with coarse punct- 

 ures at the sides, smoother at middle. 



"Length of thorax, .07 inch; 1.75°"". 



" Length of elytra, .14 inch ; 3.5°"". 



