50 Wickham — New Fossil Coleoptera from Florissant. 



indication of discal sculpture, aside from the fine piligerous 

 punctures, can be seen. The exposed tibia of the hind leg is 

 perhaps a trifle stouter than in A. ursina, about equally 

 broadened to the tip, the lateral margins (perhaps accidentally) 

 irregular ; one terminal spur shows, which is more than half as 

 long as the first tarsal joint, but the extreme apex is con- 

 cealed so that the exact length cannot be determined. Tarsi 

 rather stout for this genus, the first joint longest (about one 

 third longer than the one following) third and fourth joints 

 nearly equal to each other and slightly longer than the second, 

 claw joint again longer but ill defined, claws not in condition 

 for study. Apparently, the first, second and third tarsal joints 

 were finely longitudinally carinate above, a feature that I can- 

 not detect in any recent Amj?hicoma at my disposal. Neither 

 do I find any certain evidence that the legs were hairy, though 

 I believe that certain sculpturings on the tibia represent pilig- 

 erous punctures. The tarsal joints surely bore short stiff hairs 

 on their margins, as in the recent A. vulpina from the New 

 England coast. Width of elytral fragment, at 5 mm from tip, 

 3 mm . length f tibia, 4-75 mm ; of tarsus, entire, 7'25 mm ; of first 

 joint about P75 mm . 



Station number 14. Collection number 186, Florissant 

 Expedition 1906. Received from Prof. Cockerell. The holo- 

 type is in the Peabody Museum of Yale University, Cat. 

 No. 14. 



Lenta Fabr. 



L. evanescens n." sp. Form similar to that of the recent 

 L. collaris and equally stout. As the type is largely in pro- 

 file, it is not possible to give comparative measurements 

 of the length and breadth of different parts of the body, 

 though the head, with greater portions of the eyes and antennae, 

 the prothorax, elytra, abdomen, and parts of the legs are more 

 or less clearly shown. The antennae are very nearly approxi- 

 mate at base and are stout, the intermediate joints but very 

 little longer than broad ; the eyes are large and prominent, legs 

 stout. The specimen is a reverse, and lines of small elevations 

 indicate that the elytra were punctured in rows similarly to 

 most of our recent North American species. Total length, 

 5*60 mm ; of elytron, 3'60 mm . 



Station number not given. Collection number 86, Florissant 

 Expedition 1906. Received from Prof. Cockerell. Type in 

 Peabody Museum of Yale University, Cat. No. 15. 



A second specimen, collected at Florissant in 1906 but with 

 no station designated though bearing the collection number 

 107, is less in profile than the first and indicates that the pro- 

 thoracic constriction was slightly antemedian and fairly deep. 

 In this the broader elytron is 3'65 mm in length and about 

 l-30 mm in width. 



