HYDNOBIUS. 897 



A\ith ;i sliurt, broad, triaugular tooth bci'ore apex of posterior 

 femora. L. f — | 1. Not common. H. strigosus, Schmidt. 



Trlarthron, 



Eeddish-yellow. Elytra with nine strongly pnnctnred 

 striae, sutural stria deep througliout, interstices smooth, 

 alternate ones with a few scattered punctures. Male with 

 under-side of ])Osterior femora excised at base, dilated and 

 toothed in middle and again prominent at apex. L. 1|- 1. 

 Eare. T. Marhcli, Schmidt. 



SILPHIDAE, 



A, First joint of antennae not elongate. 



a. Head sunk in thorax, not freely moveable. 



I, Eyes present. 

 Tarsi with five joints. 



1, Antennae rather short, eighth joint larger than 

 seventh. 



Last joint of maxillary palpi conical, pointed ; ligula 

 scarcely emarginate. Colon, Herbst. 



2, Antennae rather long, eightli joint smaller tlian 

 seventh. 



Last joint of maxillary palpi conical, pointed ; ligula 

 deeply emarginate. (J ho lev a, Latr. 



II, Eyes absent. 



1, Tarsi with four joints on anterior pair and five 

 joints on hinder pairs. 



Last joint of maxillary palpi conical, pointed ; ligula 

 emarginate at apex. Antennae gradually thickened, eighth 

 joint smaller than seventh and ninth. A del ops, Tellk. 



2. All tarsi with five joints. 



Antennae gradually thickened toward apex, scutellum 

 rather large. Leptinus, Miill. 



h. Head prominent, freely moveable. 

 Tarsi with five joints. 



J. Antennae with ten joints. 



Club of antennae abrupt, four-jointed ; elytra truncate at 

 apex, shorter than abdomen. Nccrophorus, Fab. 



