86 



TEXT-BOOK OF ENTOMOLOGY 



THE THORAX AND ITS APPENDAGES 

 a. The thorax ; its external anatomy 



The middle region of the body is called the thorax, and in general 

 consists of three segments, which are respectively named the protho- 

 rax, mesothorax, and metathorax (Figs. 88, 89, 98). 



T^.X6u.a 



FIG. 88. External anatomy o 



ux xjtrrttiK, the hoad and thorax disjointed. 



The thorax contains the muscles of flight and those of the legs, 

 besides the fore intestine (oesophagus and proventriculns), as well as, 

 in the winged insects, the salivary glands. 



