STRUCTURE OF INSECTS. 333 



which are serrated, so as to fit them for the 

 closest application to any kind of surface. In 



^ffllP IZA TS II ITU ff '\***-ig? '>? 1 - 



155 



the Tabanus, or horse-fly, each foot is furnished 

 with three suckers. In the Cimbex lutea, or 

 yellow saw-fly, there are four, of which one is 

 placed upon the under surface of each of the 

 four first joints of the toes (Fig. 153); and all 

 the six feet are provided with these suckers. 

 In the Dytiscus marginalis, suckers are fur- 

 nished to the feet of the male insect only. The 

 three first joints of the feet of the fore-legs of 

 that insect have the form of a shield, the under 

 surface of which is covered with suckers having 

 long tubular necks ; there is one of these suckers 

 very large, another of a smaller size, and a 

 great number of others exceedingly small. A 

 few of the latter kind are represented highly 

 magnified in Fig. 154. In the second pair of 

 feet, the corresponding joints are proportionally 

 much narrower, and are covered on their under 

 surface with a multitude of very minute suckers. 

 The Acridium biguttulum, which is a species of 

 grasshopper, has one large oval sucker, under 



