176 MANUAL OF NATUKAL HISTOKY. 



I. ORDER. — Beetles (Coleoptera), 



Wings four, the anterior one (or elytra) hard, 

 horny, or leathery, covering the hind wings and 

 abdomen in repose, united down the back by a 

 straight suture ; hind wings membranous, folded 

 when at rest ; mouth with transversely moveable 

 jaws. 



I. LEGION. — Adephagous-Beetles (Adephaga). 



Outer lobe of maxillae distinct, jointed, palpiform ; 

 lower jaws armed with spines and ending in an acute 

 hook: antennae long and slender; anterior tarsi 

 generally dilated in the males. Predaceous, feeding 

 on other insects. 



I. SUB-ORDER. —Predaceous Ground-Beetles 



(Geodephaga). 



Legs long, formed for running ; the four hinder 

 placed at equal distances apart ; body oblong ; an- 

 tennae filiform or setaceous ; eyes prominent. Ter- 

 restrial, 



1. Family. — Tiger-Beetles (Cicindelidae). Maxillae 



with a moveable claw at tip ; mandibles 

 strong, acute, armed with teeth; antennae 

 filiform ; labial palpi hairy, 3-jointed, with a 

 moveable base ; head large ; eyes prominent ; 

 legs long, slender ; fore-tibiae not notched on 

 inner side. Carnivorous ; fly in the sunshine ; 

 run with great agility. 



2. Family. — Bombardier-Beetles (Brachinidae). Max- 



illae with a fixed claw at tip ; labrum linear, 



