ATTEMPTED DIVISION OF BRITISH INSECTS. 419 



earth, at the margins of ponds, among roots of trees and grass. 

 Imago, with filiform antennae ; mandibles short and strong ; 

 maxillae arcuate and very acute ; galea palpiform and articulate ; 

 the fore-tarsi patellated in the males ; the middle and hind-legs 

 flattened and ciliated; form oval. Inhabits water, feeding on 

 aquatic animals ; swims with great ease and swiftness, moving 

 • the corresponding legs simultaneously. Acilius, Dytiscus, Colym- 

 betes, Noterus, Hydroporus, Halipius ? 



Natural Order. — Carabites, Ground-beetles, 



Larva with strong arcuate mandibles ; active and carnivorous. 

 Inhabits roots of grass, rubbish-heaps, decaying vegetables, moss, 

 under stones, &c. in which situations it pursues and seizes its 

 pr«y. Pupa changes in the earth. Imago, with moniliform 

 antennae ; mandibles moderately short, very strong ; maxillae 

 terminate in a blade, sometimes acute, but never articulated ; 

 galea articulate and palpiform. Universally distributed, running 

 on the ground in pursuit of prey ; chiefly nocturnal, and during 

 the day found principally under stones and timber, at the roots of 

 grass, in the sand of gravel-pits, &c. ; sometimes flies, but not to 

 avoid pursuit. Elaphrus, Bembidium, Harpalus, Carabus, Dys- 

 chirius, Brachinus, Dromius, Odocantha, Drypta. 



Natural Order. — Cicindelites, Tiger-beetles. 



Larva with strong arcuate mandibles, and frequently with two 

 remarkable recurved hooks on its back ; it is carnivorous, and 

 lies in wait for its prey in holes or dens, which it constructs in 

 loose earth or sand, in sunny places. Pupa changes in the holes 

 of the larva. Imago, with strong, long, arcuate, and deeply- 

 toothed mandibles, which cross each other at about half their 

 length ; blade of the maxillae acute and articulated ; galea palpi- 

 form and articulated ; legs very long and slender : diurnal, car- 

 nivorous, of light and elegant form ; brilliant colours. Runs 

 with amazing activity ; flies to avoid pursuit. Cicindela. 



Natural Order. — Staphilinites, Devil's Coach-horses. 



Larva with strong mandibles ; active, mostly carnivorous. Found 

 under stones, at the roots of grass, and in rubbish-heaps, &c. 

 Pupa changes in the same situations. Is remarkable for the 

 compactness with which the limbs are attached, giving it the 

 appearance of the Amorpha adermata. Imago, with moniliform 

 antennae; strong and acute mandibles; obtuse maxillae ; rounded 

 and never palpiform galea. These beetles are distinguished at 



