106 Objects for the Microscope. 



The antennae eleven-jointed, and terminated by a reversed 

 conical club. 



I must not describe so fully any more of these beautiful 

 slides; but recommend you, if possible, to obtain the 

 following whole mounted Coleoptera: 



Lcecophilus Minutas, remarkable for its feathered legs. 



Hattica, or Turnip-fly, thick muscular 



thighs for leaping. 



Thyanus, or Grass-flea, also with muscular thighs and 

 sculptured elytra. 



Dimonia cynoglossi . one of the Tetramera, with thick- 

 ened thighs and beautiful head. 



Haliplus confirms . one of the Hydrocantheri, or 

 Swimmers, with beautifully fringed 

 legs for swimming. 



Hypliidius ovatus . one of the Water-beetles, with 

 fringed legs for swimming, and a 

 curious spine at the tip of each 

 elytron. 



Oyrinus natator . a Water-beetle. (This is described 

 in leg of Gyrinus.) 



HEMIPTEBA. 



These are sucking insects. Their mouth has a long 

 retractile tube, and several flne lancets, forming a long pro- 

 boscis, which is laid along the breast during repose, and 

 maybe seen in all the Field-bugs (Cimex) and the Aphides, 

 which belong to this order. The wings are membranous, 

 and covered with semi-transparent cases analogous to the 

 elytra of Beetles. The tarsi are always three-jointed. A 

 few of them inhabit the water, and of these the Velia rivu- 

 lorum and Notonecta are mounted whole. 



VELIA RIVULORUM. 



Most people have observed groups of water insects 

 sporting on the surface of small ponds, or swimming 



