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, aud form a round cell in the bank. 

 Dytiscm fasciveniris Say; Acilius mediutus Say. 



Family Haliplidae. Antennae 10-joiuted; small yellowish water- 

 beetles, spotted with black. Hali/plus famatus Aube. 



B 



FIG. 129. Dytiscus marginalia, from Europe. A, male, with smooth elytra and 

 fore tarsi expanded into suckers; B, female. 



Family Amphizoidse. Aquatic beetles of singular structure, with 

 the legs adapted for walking. Amphizoa insokns Lee. 



Family CaraMdse. 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 larvae are carnivo- 

 rous, and live under stones, 

 etc., in the same situations as 

 the parents. In Harpalus 

 the body is broad, while in 

 Casnouia 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. Carahm serra- 



tus Say is a typical form, as is 

 also Calosoma calidum Fabr. , 

 which climbs trees after cat- 



FIG. 130. Harpalus caliginosus. natural 

 size; larva of undetermined species, 

 enlarged 3 times. 



erpillars. Platynus cupripenne Say; Brachinus fumans Fabr. 



Family Cicindelidse. Antenna? on the front above the base of the 

 mandibles; ligula small; female abdomen with 6, male with 7, seg 

 ments. 



