WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 489 



projecting far beyond the elytral apex. Length, to abdominal tip, 

 8.75 mm. ; of elytron, 6.50 mm. 



Described from one specimen with counterpart. 



Type No. 2,687, 2,688 M. C. Z. Florissant, Col. (No. 7,972 

 and 7,976 S. H. Scudder Coll.). 



This is very easily separable from the other Florissant species of the 

 family by the much greater size and more elongate form. It looks 

 like the recent T. hilaris, found in our eastern states. 



MORDELLA STYGIA, sp. nov. 



Plate 15, fig. 6. 



Form stout. Head mutilated. Antennae slender, the nine joints 

 which are visible subequal in length and hardly incrassate distally. 

 Pronotum rather strongly arched, minutely and closely punctulate, 

 too finely for definition under a hand lens. Elytron rounded at tip, 

 relatively long, sculpture of the same nature as that of the prothorax 

 but even less pronounced. Under surface of body somewhat rugosely 

 punctulate on the meso- and metasternal flanks, less strongly and a 

 little less closely on the abdomen. Anal style short and stout. Legs 

 small, not very stout. Length, to elytral apex, 4.35 mm.; of elytron, 

 3.20 mm. 



Described from one specimen. 



Type No. 2,689 M. C. Z. Florissant, Col. (No. 9,968 S. H. 

 Scudder Coll.). 



There should be no difficulty in recognizing this species. It is 

 considerably smaller than the Florissant fossil Mordella lapidicola and 

 much larger than either of the two species of Mordellistena described 

 from these shales. I have placed it in the former genus, in preference 

 to the latter, on account of its size and rather heavy build. 



MORDELLISTENA SCUDDERIANA Wickham. 



Four specimens, No. 2,690-2,693 M. C. Z. (No. 5,425, 6,269, 10,241, 

 11,186 S. H. Scudder Coll.), none with counterparts. 



