412 CLAVICOimiA — HISTERIDAE. 



front ; oblique lateral line of metasternum somewhat curved, 

 scarcely reaching beyond middle ; body impunctate above. 



My r metes, Mars. 

 B B, Anterior tibiae with distinct spines, pos- 

 terior pair distinctly toothed. 

 Longitudinal lines of prosternum suddenly convergent 

 at apex; body punctured. Gnathoneus,'Diiy. 



2, Cavities for reception of club of antennae not 

 reaching anterior margin of prosternum and 

 separated by a tolerably broad space. 

 Funiculus of antennae thickened at apical end, its first 

 joint much larger than rest ; clul) roundish, cavity for its 

 reception rather deep; anterior til;)iae toothed, posterior pairs 

 with a double row of spines ; thorax with only one mar- 

 ginal stria; elytra with first dorsal stria nearly always 

 absent, the other dorsal striae oblique, generally abbreviated 

 from middle, humeral stria fine, often joined to inner lateral 

 one, outer lateral stria rudimentary or absent. 



Saprinus, Er. 

 II, Antennae inserted on forehead. 



1, Prosternum produced in front. 



Body cylindrical ; thorax as broad or nearly as broad 

 before middle as at base, with only one marginal stria; 

 funiculus of antennae not thickened at apical end, its 

 first joint not much larger than second, club oval, cavity 

 for its reception distinct, placed in middle of sides of pro- 

 sternum ; mandibles slightly prominent ; anterior tibiae 

 broader in middle than at apex, toothed; posterior pairs 

 with a few teeth and two unequal spines at apex ; elytra 

 without striae. Teretrius, Er. 



2. Prosternum cut off straight in front. 



A A. Thorax with a separate raised side border 

 and generally a transverse furrow. 

 P)0(ly long oval ; funiculus of antennae not thickened at 

 a[)ical end, cavities for reception of club of antennae deep, 

 placed in middle of sides of prosternum; mandibles 

 scarcely prominent ; anterior tibiae as broad at apex as in 

 middle, toothed; posterior pairs elongate; elytra punctured 

 throughout, with one or two oblique striae at base ; pro- 

 sternum broad, with two longitudinal furrows and a central 

 ridge, often interrupted. " Plegaderus, Er. 



