FOSSIL COLEOPTERA 5 



the recent beetles of given genera when compared with their pre- 

 sumed relatives of the Miocene rocks, though an occasional speci- 

 men has been assigned to one genus or another as a large or small 

 exponent thereof. No really large family or series of families 

 seems to be entirely wanting, unless it be the Pselaphida? or the 

 Histeridae, of which latter Dr. Scudder mentions seeing a speci- 

 men though none is described in any of his papers. I have seen 

 nothing that can possibly belong there, in spite of the fact that 

 the genus Saprinus is today a common inhabitant of lake shores 

 and the texture of the exoskeleton is such that there would be no 

 doubt of its preservation as a fossil if deposited in the mud at 

 one of the periods of shale formation. Small eoleoptera of all 

 families are extremely few in the collections though this may per- 

 haps mean that they have been overlooked by field investigators. 

 Thus, no Triehopterygida?, Pselaphida^ or Scydmienida? have 

 been described, nor have I seen any. In the Clavicorn families 

 now well represented along the forested shores of inland waters 

 nearly all of the smaller forms seem to have been undeveloped 

 or to have been lost after their entombment. 



All of the drawings are from camera lucida figures by the 

 author, except those of Protapate and Macrodactylus which are 

 free hand. No structures have been "restored" but in case of 

 such sculpturing as lines of fine punctures the courses of these 

 lines have been indicated without attempting to reproduce each 

 individual point. Attention has been called in the text to all 

 such diagramatic representation and it is always accompanied by 

 a detail figure on a larger scale or by a definite verbal descrip- 

 tion. 



Arranged by families, the species herein reported upon are as 

 follows : 



CARABID^. PAUSSID^. 



Trechus fractus n. sp. Paussopsis secunda n. sp. 

 Amara cockerelli n. sp. STAPHYLINID^. 



Amara danas Scudd. Quedius mortuus n. sp. 



DYTISCID^. Quedius chamberlini Scudd. 



Ccelambus miocenus n. sp. Staphylinus lesleyi Scudd. 



Agabus charon n. sp. Leptacinus leidyi Scudd. 



SILPHID^. Tachinus sommatus Scudd. 



Miosilpha necrophiloides n. sp. Tachyporus nigripennis Scudd. 



