MANUAL OF NATURAL HISTORY 199 



dissimilar, the hinder often compressed, with 

 long tibial spurs ; tarsal claws bifid. Fre- 

 quent flowers, fly with rapidity, leap well ; 

 often parasitic on other insects. 



70. FAMILY. Unicorn-Beetles (Notoxidae). An- 



tennae simple, rarely filiform ; maxillary palpi 

 with terminal joint hatchet - shaped ; head 

 subcordate, with a distinct neck ; thorax 

 narrowed behind, sometimes armed in front ; 

 elytra rigid, as long as abdomen legs rather 

 short, claws simple. Found about roots of 

 grass in sandy situations. 



71. FAMILY. Parasitic Wood - Beetles (Horiidse). 



Antennae rather short ; palpi filiform, labial 

 as long as maxillary ; jaws large, porrected, 

 ending in an acute point ; head large, dilated 

 behind eyes ; thorax sub-quadrate ; elytra 

 flexible ; tarsal claws denticulated, furnish- 

 ed beneath with a long slender filament. 

 Parasitic in the nests of wood-boring Bees. 



72. FAMILY. Social Grass-Beetles (Scydmaenidae). 



Antennae rather long, distinctly clavate ; 

 palpi with third joint large, pear-shaped, 

 terminal, minute; head slightly narrowed 

 behind ; thorax sub-globose, broader than 

 head ; elytra ample, convex, entire ; legs 

 slender, thighs incrassated; tarsi 5-jointed. 

 Live among grass and moss, in society. 



73. FAMILY. False Snout - Beetles (Salpingidae). 



Head deeply inserted, produced in front 

 into a short flattened snout; antennae in- 



