92 POPULAR ENTOMOLOGY. 



COLEOPTERA. GYRINIIXE. 



GYRINUS. 



Generic Distinctions. Antennae short and thick, forming a mass, 

 almost like ears ; head sunk in the thorax ; hinder legs very short, 

 compressed, and hairy; fore legs long; body highly polished. 



GYRINUS NATATOR. (Plate I.) Nearly three lines long, of 

 an ovate form, blue-black in colour, with a metallic lustre, 

 the breast rather red ; found in water. 



COLEOPTERA. DYTICID.E. 



DYTICUS. 



Generic Distinctions. Antennae eleven-jointed and setaceous; 

 head thick, and partly sunk in the thorax; elytra in some species 

 destitute of furrows in the males ; body oval ; colour black, tinged 

 with olive ; size large. 



DYTICUS MARGINALIS has the body blackish -green above, 

 yellowish-brown below, the thorax and elytra margined with 

 yellow. The female is furrowed ; it is about an inch in 

 length. 



