B 





Fig. 56. — Astdeiia fluflatilisi. — The structure of the cuticle. .1. trans- 

 verse section of a joint of the forceps ( x -t) ; s, seta3 ; B, a por- 

 tion of the same ( x 30) ; C, a portion of B more highly magnified. 

 a, epiostracum ; h, ectostracum ; c, endostracum ; rf, canal of seta ; 

 c, canals filled with air ; s, seta. D, section of an intersternal 

 membrane of the abdomen, the portion to the right in the natural 

 condition, the remainder pulled apart with needles ( x 20) ; E, 

 small portion of the same, highlj' magnified ; a, intermediate sub- 

 stance ; h, laminae. F, a seta, highly magnified ; a and /;, joints. 



