STAPHYLINIDiE. 



75 



usually 3-jointed, occasionally 2-jointed, as a rule of normal form, 

 but in Myllcena and a few other genera they are more or less 

 setiform. 



The hind-body or abdomen is sometimes parallel-sided, sometimes 

 strongly narrowed, and more or less conical ; in very few instances 

 is it wider behind than the elytra; it is usually more or less setose, 



Fig. 33. — Staphylinus tenebricosus. Underside : p.?nx., maxillary palpus ; 

 p.l., labial palpus; m, mentum ; s.g., gular sutures; cL, clavicle; st^ pro- 

 sternum ; st 2 , mesosternum ; st 3 , metasternum ; eps , epm 2 , episterna and 

 epimera of mesosternum ; eps 3 , epm s , episterna and epimera of meta- 

 sternum ; stigm., free stigma of the presternum ; C 1; C 2 , C 3 , coxas; V 1 -V 7 , 

 ventral segments of the hind body; By, anal styles, the side pieces of the 

 completely divided segment. (After Granglbauer ; lettering somewhat, 

 altered.) 



and very often bears at its apex two style-like processes. In many 

 genera the modifications of the terminal segments, especially in the 

 male, are of very great importance in determining species (e. g. in 

 Homalota, Tachinus, etc.). In some species (e. g. Enceplialus) the 

 hind-body can be curved up over the back so as to cover the front 

 portion ; in others (e. g. JCantholinus) the abdomen is curved in 



