176 MANUAL OF NATUEAL HISTORY. 



I. OKDEK. 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; antennse 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- 

 tennse 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, 



