114 



ENTOMOLOGY. 



them for an aquatic life; body oval, broad, and flattened; legs 

 flattened, oar-like, and fringed. The larvae are called water-tigers 

 from their fierce habits and long, slender jaws; when about to pu- 

 pate they leave the water, and form a round cell in the bank. 

 Dytiscus fasciventris Say; Acilius mediatus Say. 



Family Haliplidae. — Antennae 10-jointed; small yellowish water- 

 beetles, spotted with black. Haliplmfasciatw Aube. 



B 



Fig. 129.— Dytiscus marginalis, from Europe. A, male, with smooth elytra and 

 fore tarsi expanded into suckers; B, female. 



Family Amphizoidae. — Aquatic beetles of singular structure, with 

 the legs adapted for walking. Amphizoa inmlens Lee. 



Family Carabidse. — The 

 ground-beetles have the an- 

 tennae arising at the side of 

 the head between the base of 

 the mandibles and the eyes. 

 The species are very numer- 

 ous; their larva? are carnivo- 

 rous, and live under stones, 

 etc., in the same situations as 

 the parents. In Harpahis 

 the body is broad, while in 

 Casnonia the head and pro- 

 thorax are very slender. 

 Brachinus, the " bombar- 

 dier" beetle, is remarkable 

 for discharging from its anal 

 glands, with an explosion, a 

 pungent fluid. Cnrabus terra- 

 ins Say is a typical form, as is 

 also Calo8oma calidum Fabr., 

 which climbs trees after cat- 



natural 

 species. 



Fig. YiO.—Harpclns caliginosus. 



size; larva of undetermined 

 enlarged 3 times. 



erpillars. Plalynnx eupripenne Say; BracMmis fumansFsibT. 



Family Cicindelidae. — Antenna' on the front above the base of the 

 mandibles; ligula small; female abdomen with (3, male with 7, seg 

 ments. 



