IXTRODUCXION. 



The 



trochanter 



legs consist of five distinct sections, known as the coxa, 

 '.er, femur, tibia and tarsus. The front and middle legs 



Fig. 11. — FiH)nt leg of Cyrtacanthacris: a, coxa, h, trochanter, c, femur, 

 d, tibia, e, tarsus. 



are generally nnich shorter than the hind legs, and much less 

 . -D strongly developed, though their 



femora are not uufreqiiently 

 more or less widened or flattened, 

 and are sometimes toothed or 

 spined. The hind femora are 



generally much thickened at the 

 base, enabling the insect to leap. 



The tibiae and tarsi are also some- 

 times thickened and lamellated, but 

 more rarely. The hind tibitc have 

 nearly always a double row of 

 spines ou the upper surface, and 

 two or more spines at the ex- 

 tremity, called calcaria or spurs. 

 In the AceiuiidyE the tarsi are 

 three-jointed, and the first joint is 

 generally the longest, and is fre- 

 quently provided Avith three pads, 

 called 2^ulviUi, on the under surface. 

 The last joint terminates in two 

 claws, between which is a pad called 

 the arolium (wanting in the 

 AcRTDiiN.i;), a word of \\hich I 

 have been unable to discover the 

 origin. 



Fig. 12. — (A) Hind tibia aud tarsus of Leptacris : a, tibia, b, outer apical 

 spine, which is absent in many genera, c, c, calcaria ; (B) upper 

 side of tarsus of Locusta, showirg the three joints, and d, the 

 arolium ; (C) under side of same, sliowing three pulvilli on basal 

 joint and one on second. 



The tegmina of the Acridiid.i; are generally comparatively long 

 and narrow, of a parchment-like consistency, and are not folded. 



