WTCKHAM: new MIOCENE COLEOPTERA from FLORISSANT. 435 



front margin seems to have nearly or quite concealed the head during 

 life. The sculpture is very fine throughout but in places the elytra 

 shoAv traces of punctulatc striae. The pronotum is margined at the 

 sides. While I ha\c no specimens of recent Chelonarium for compari- 

 son, I think that the reference to this genus is fairly safe, since, in all 

 visible characters, the agreement is close to the description of LeConte 

 and the figure of Lacordaire (Genera des Coleopteres, Atlas, Plate 24, 

 fig. 4.). This correspondence extends even to the crimping of the 

 pronotal base as will be seen by examining the cited figure with a 

 magnifying glass. Chelonarium is found in Florida and Central 

 America and the occurrence of this fossil adds another distinctively 

 southern form to the Florissant fauna. 



PARXIDAE. 



PsEPHENUS LUTULENTUS Scudder. 



One specimen, Xo. 2,462 M. C. Z. (Xo. 11,659 S. H. Scudder Coll.), 

 evidently the counterpart of the one figured by Scudder. 



Dryops eruptus \Yickliam. 



Two specimens. No. 2,463, 2,464 (No. 6, 8,329 S. H. Scudder Coll.), 

 appear to belong here. 



Dryops tenuior ^Yickham. 



A single specimen, X'o. 2,465 M. C. Z. (Xo. 3,756 S. H. Scudder 

 Coll.) is in fairly good condition. It does not show the lines of elytral 

 punctures which are faintly indicated in the type, but agrees in other 

 characters. 



DASCYLLIDAE. 



Protacnaeus, gen. nov. 



Form similar to that of Acnaeus or Ectopria, short, oblong ovate. 

 Head of rather large size, antennae, in one sex at least, filiform. An- 

 terior coxae contiguous. ^Middle coxae rather small, oblique, distinctly 



