CUCUJID.E. 83 



long, not much longer than the elytra, the front margin straight, the hind 

 margin scarcely convex, the sides well rounded and entire, with no angula- 

 tions, the front and hind angles nearly equally rounded. Elytra entirely 

 similar in form and sculpture to those of P. fuscus Er., the thorax being as 

 there slightly more distinctly punctate. Scutellum transverse, small. 



Length, 3.5 mm.; of antennae, 1 mm.: breadth of prothorax, 1.25 mm.; 

 of elytra, 1.4 mm. 



Florissant, Colorado; one specimen. No. 112. 



LITHOCORYNE (A?'6»o?, nopvvr)) gen. nov. 



Closely allied to Lathropus Erichson, from which it differs principally 

 in the narrower head and the structure of the antennae ; of the last, which 

 are as long as the head and half the thorax, the fii'st joint is large and stout, 

 but longer than broad and only half as broad again as the joints beyond; the 

 second of entirely similar size to the following, or a very little shorter, and, 

 with the third to the eighth, obconic, truncate, longer than broad; the ninth 

 to eleventh enlarged into a distinct club ; the ninth and tenth hemispherical, 

 truncate at tip, nearly twice as broad as long; the terminal segment broad 

 ovate, longer than broad, but scarcely narrower than the preceding. Pro- 

 thorax narrowed posteriorly, without lateral denticulations, the hind angles 

 rounded, the surface depressed, as in Cucujiis. 



The single species known is of about the size of the living species of 

 Nausibius or of Pediacus, and much larger than those of the more nearly 

 related Lathropus. 



LiTHOCORYNE GllAVIS Sp. nOV. 



PI. IX, %. 4. 



Head, including the mouth parts, shorter than broad, the rather large 

 eyes scarcely disturbing the full contour of the sides, distant from the pro- 

 thorax, but little naiTower behind and about three-fourths the width of the 

 thorax; sculpture of the surface similar to but more subdued than that of 

 the prothorax ; antennal stalk moderately slender, the whole reaching to the 

 middle of the prothorax. Prothorax nearly twice as broad as long, broadest 

 anteriorly, very gradually and regularly tapering to the base, which is 

 about a seventh narrower than the front; in front the sides are suddenly 

 turned inward, and the lateral angles, which are sharp, are produced forward. 



