464 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



roughening, which is brought out only under high magnifying power. 

 Eyes small. Antennae slender, distal segments lost, second joint 

 much shorter than the third. Pro thorax approximately one-third 

 broader than long, sides regularly arcuate or nearly so, angles not 

 long nor prominent, surface practically smooth, like the head. Elytra 

 about 3f times as as long as the prothoracie median hne, appar- 

 ently very finely and faintly striate, but of this I can not be sure. 

 Legs of moderate size, showing no details of any importance. Length, 

 from front of head to abdominal apex, 10.25 mm. 



Type.— Cs.t. No. 63441, U.S.N.M. 



The single specimen, with counterpart, looks like Platynus, but the 

 almost complete lack of sculpture is suspicious. However, this may 

 be due partly to the state of preservation, which is only fair. It is 

 not at all like P. tartareus from these shales. 



Genus CRATACANTHUS Dejean. 



CRATACANTHUS FLORISSANTENSIS, new species. 



Plate 37, fig. 2. 



Form rather stout, as in the recent C. duhius. Head large, as in 

 that species, with prominent jaws. Antennae not well preserved, 

 but showing that they reached to, or somewhat beyond, the protho- 

 racie hind angles. Prothorax narrowed behind, broader in front of 

 the middle, sides arcuately narrowing again to the front angles 

 which are a little prominent but hardly acute. Elytra displaying no 

 sculpture aside from feeble traces of striae showing through. Legs 

 rather short and stout. Length, from apex of mandibles to that of 

 abdomen, 9 mm.; of elytron, 5 mm. 



T2/2>e.— Cat. No. 63442, U.S.N.M. 



Described from one specimen, showing the under side. The resem- 

 blance to our modern North American C. duhius is quite marked, 

 but apparently the fossil has a somwhat shorter prothorax and 

 longer antennae. It is not like any of Scudder's described fossil 

 Carabidae, the large head being definitive. 



Genus HARPALUS Latreille. 



^ HARPALUS ULOMAEFORMIS, new species. 



Plate 37, fig. 3. 



Form quite elongate, parallel sided. Head of moderate size, man- 

 dibles not abnormally developed. Antennae not preserved, except a 

 small part of the base of one which is too poor for description. Pro- 

 thorax much narrower anteriorly, arcuate in regular curve from 

 the base which is the widest part. Elytra showing faint signs of 

 punctured striae which have set through so as to appear on the imder- 

 side. Abdomen with practically straight sides to near the apex. 



