100 CLASS VIII. ORDER V. 



ORDER 5. COLEOPTERA. 



Having four wings, the outer pair ( called ely- 

 tra } crustaceans, the inner pair folded transverse- 

 ly, or not extended longitudinally. 



Sec. A. Tarsus with Jive joints ; palpi six. 



CICINDELA, (tiger-bug,) antennae setaceous 

 jaws prominent, denticulated ; eyes protuberant \ 

 thorax roundish and margined. 



CARABUS, autennse setaceous ; thorax some 

 what heart-form, truncated in front, margined ; 

 abdomen ovate ; wing-sheaths margined. 



PYTISCUS ; (swimmer,) antennae setaceous ; hind 

 legs villose, formed for swimming and terminated 

 by scarcely visible claws. 



HYDRACHNA, (water witch, water-spider,) legs 

 eight, formed for swimming; head, thorax and ab- 

 domen united, or connate ; feelers two, jointed ; 

 yes 2, 4 or 6. 



GYRINUS, (glimmer-cheffer,) antennae clavate^ 

 stiff, shorter than the head, eyes apparently fouiy 

 two above and two below. 



Sec. B. Tarsus with five joints ; palpi four ? 

 antennae not enlarged at the ends nor luminated. 



STAPHYLINUS, (rove beetle,) antennae, monilifoi^m ; 

 wing-sheaths halved ; wiags covered ; tail simple, 

 occasionally protruding two oblong vesicles. 



BUPRESTIS, antennae setaceous, of the length of 

 the thorax ; head half withdrawn beneath the 

 thorax. 



ELATER, (snap-bug,) antennas setaceous ; body 

 oblong, when placed on the back, springing up by 



