20S ZOOLOGY. 



degree of beauty, they are exceedingly numerous, and though 

 the general formation of the antenna? are the same through- 

 out, in some species they are short ; that is, not of equal 

 length with the body ; in others, they are termed moderate^ 

 or of the same length as the body, and long, when their 

 length exceeds that of their bodies. 



18. t,eptura. Antennce setaceous, composed of an indefi- 

 nite number of spherical joints ; fig. 15, plate 3 ; wing- 

 covers tapering towards the tips; thorax slender, 

 rounded. 



1 9. Necydalis. Antennce setaceous ; wing-sheaths smaller, 

 shorter or narrower than the wings or abdomen ; tail 

 entire. 



20. Lampyris. Fire-Fly, or Glow- Worm. Antennee 

 filiform, in some species pectinated, in others plumose 

 on one side, fig. 17, plate 3; wing-covers flexile; 

 thorax flat, semi-orbicular, surrounding and concealing 

 the head ; abdomen having the sides plaited into papil- 

 lae ; in most species the females are wingless, and emit 

 a feint light. 



51. Cantharis. Antenna; setaceous, or filiform; thorax 

 margined, usually shorter than the head ; wing-covers 

 flexile ; abdomen plaited into papillse on the sides. 



The insects in this genus are generally roracious, feeding 

 on other insects, some few devour the leaves and stems of 

 plants ; our native species may be found during the warm 

 summer months, oa the stems of plants. 



