EXTERNAL STRUCTURE OF INSECTS. 



Fig. 13. 



resistance. The limb is, like most swimming legs, 

 beautifully fringed with hairs. 



In figure 13 is seen a leg fitted for leaping, the leg of 

 the common grasshopper ; and the thick and muscular 

 thigh,' the strong but 

 slender and spurred tibia, 

 and the firmly knit but 

 supple joints, all point 

 to the action for which 

 this limb is adapted. 

 Besides this, the great 

 length of the hind or 

 leaping legs as com- 

 pared with the two other 

 pairs should be remem- 

 bered, and the leaping leg 

 of the grasshopper will 

 be seen to be as good an 

 example of peculiar development for a special purpose 

 as the swimming legs lately described. 



From this we turn to the fore leg of a near relation of 

 the Grasshopper, but an insect of far other habit* 

 Figure 14 represents the burrow- 

 ing mole-like hand of the mole 

 cricket. In this curious instru- 

 ment, as in the paddle of the 

 gyrinus, the tibia and tarsus are 

 unusually broad and flat, and so 

 arranged as to be capable of fitting 

 close to each other and to the a< p ore i eg O f Mole Cricket, 

 thigh. The tibia is deeply cut ^n iron, outside. 



1 " b. Ditto from inside. 



into finger-like lobes, to which it c . Coxa of fore leg. 



owes its hand-like appearance, and like the broad short 



Hiud leg of Giasshopper (Acrida 

 viridisaima). 



Fig. 14. 



