THE LEGS: THEIR STRUCTURE AND FUNCTIONS 95 



TABULAR VIEW OF THE SEGMENTS, PIECES, AND APPENDAGES OP 



THE THORAX 



b. The legs : their structure and functions 



The mode of insertion of the legs to the thorax is seen in Figs. 90, 

 97, 101, and 103. They are articulated to the episternum, epimerum, 

 and sternum, taken together, and consist of five segments. The 

 basal segment or joint is the coxa, situated between the episternum 

 and trochanter. The coxa usually has a posterior subdivision or 

 projection, the trochantine; sometimes, as in Mantispa (Fig. 103), the 

 trochantine is obsolete. "We had previously supposed that the tro- 

 chantine was a separate joint, but now doubt whether it represents 

 a distinct segment of the leg, and regard it as only a subdivision of 



