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 (Notoxidas). 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 (Horiidae). 



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 (Salpingidaa). 



Head deeply inserted, produced in front 

 into a short flattened snout ; antennae in- 



