FSELAPHIDJE. 345 



behind: ant. gradually thickened to the apex, the terminal joint sometimes 

 very large : max. palpi generally acute ; eyes small : elytra short : tibia, 

 sometimes spinous. 



Fam. 77 Staphylinid^e. Tarsi 5-jointed, anterior often dilated; all ter- 

 minated with 2 claws : head exserted, with a distinct neck : tho. 4-drate, 

 or somewhat ovate ; at times rounded or heartshaped : ant. shortish, 

 rather stout, inserted between the eyes : max. palpi short, filiform : labrum 

 mostly with a deep notch or slit in front: body elongate: elytra moderate; 

 tibia; mostly spinous. 



Fam. 78 Stenidje. Tarsi 5-, rarely 4-jointed, terminated with 2 claws : head 

 large, exserted, with a distinct neck : tho. rounded, or heartshaped, often 

 globose : ant. somewhat filiform ; mand. long, acute, acutely toothed 

 within : max. palpi long, clavate, with apical joint minute : labrum entire : 

 eyes frequently large : tibia simple. 



Fam. 79 Oxytelid^e. Tarsi 3-, 4-jointed, very rarely 5-jointed, terminal 

 joint longer than the others together, with 2 claws : head exserted ; neck 

 distinct : tho. mostly heartshaped : ant. thickened towards the apex : 

 max. palpi short, apical joint distinct : labrum entire : body linear : anterior 

 tibia spinose, or toothed on the outer margin. 



Fam. 80 Omaliid^e. Tarsi 5-jointed, terminated with 2 claws : head ex- 

 serted: tho. mostly convex, and widened behind: ant. shortish, thickened 

 at the tip, rarely filiform ; max. palpi short, terminal joint minute : labrum 

 transverse, entire : body broad, flattish : elytra rather long : tibia simple : 

 ocelli sometimes present. 



Fam. 75. PSELAPHIDiE Leach. 



dlxx. Pselaphus Tarsi with 1 claw : ant. inserted on a frontal tubercle : 

 max. palpi as long as the antenna?, the terminal joint long, clavate : body 

 rather elongate ; elytra and abdomen flat. 



(dlxxi. Tykus Tarsi with 2 claws; ant. shortish, the 3 terminal joints en- 

 larged : max. palpi with 2d joint elongate, terminal large, clavate : tho. 

 somewhat globose : middle trochanters with a spine. ) 



dlxxii. Bryaxis Tarsi with 1 claw : ant. inserted beneath the margin of the 

 forehead : max. palpi with terminal joint conical, rather dilated exter- 

 nally : tho. heartshaped, 3 foveolated : body short, somewhat convex. 



dlxxiii. Batrisus Tarsi with 2 claws : ant. straight, inserted in a lateral 

 groove : max. palpi with terminal joint acute : tho. with 3 longitudinal 

 furrows : body somewhat elongate, and rather convex. 



dlxxiv. Tychus Tarsi with 1 claw : ant. inserted on a frontal tubercle ; 

 5th joint dilated in $ : max. palpi very much elongated, the 2d and 3d 

 joints dilated and hatchet-shaped: tho. without impressions, widest behind: 

 body short, convex. 



dlxxv. Arcopagus Tarsi with 1 claw : ant. inserted on the sides of the 

 forehead ; 2d joint moderate, not thicker than the basal ; max. palpi as 

 long as antennae, apical joint ovate, securiform : tho. narrowed behind: 

 body short, very convex. 



dlxxvi. Bythinus Tarsi with 1 claw : ant. inserted on the sides of the fore- 

 head ; 2d joint, especially in the $ , very large : max. palpi very long, the 

 terminal joint large, securiform : tho. narrowed behind : body short, very 

 convex. 



dlxxvii. Trimium Tarsi with 1 claw : ant. inserted beneath the edge of the 

 forehead ; terminal joint very large : max. palpi with apical joint securi- 

 form : tho. somewhat ovate : body elongate, somewhat cylindric. 



dlxxviii. Euplectus Tarsi with 1 claw : ant. inserted beneath the edge of 



