COLEOPTERA CHARACTERS, HABITS, CLASSIFICATION 57 



m-ci 



various hard chitinous parts of the insect. Behind the head comes the 



prothorax, which is capable of a certain amount of movement of itself. 



It varies in shape round, angular, square, trapezoidal, etc. The other 



parts of the 



thorax, the meso- 



and metathorax, 



are hidden 



neath the 



t r a and 



not visible 



above. 



mesothorax 



be- 

 ely- 

 are 

 from 

 The 

 i s 



small, the meta- 

 thorax being very 

 large in the 

 winged forms of 

 Coleoptera. In 

 the figure the dif- 

 ferent parts of the 

 thorax and the 

 other simpler por- 

 tions of the ex- 

 ternal surface are 

 named. For full 

 details on the sub- 

 ject the reader 

 should consult a 

 text-book on en- 

 tomology. The 

 elytra when 

 closed cover 

 nearly all the 

 mesothorax and 

 the whole of 

 the metathorax, 

 lower wings, and 

 abdomen. The 

 upper portion of 

 the mesothorax 

 may be visible in 

 the shape of a 

 triangular or 

 square, etc., 

 shaped piece 

 known as the 



w-oc 



sm. H 



tar! 



guL. - 



eps 



IG. 29. Longicorn beetle (AVA-. era). Ventral view, legs removed 

 on one side, t, eye ; cx l a 8 coxae of front, middle, and bin. 

 t>- 1 2 8 trochanter of ditto ; /fi l - " femora of ditto ; 

 tibiae of ditto; tar 1 * 8 tarsi of ditto ; st l :i prosternum, in* 

 sternum, metasternum ; />'-, trochanter of middle leg : 

 epimera of prothorax, mesothorax, and metathorax ; </>*'*, epister- 

 num of mesothorax ; eps*, episternum of metathorax. 

 head : e, eye ; fr, front ; fr.s, frontal suture ; ad, ante cl> 

 c/, clypeus; //>, labrum or up|x-r lip; W, mandible. 

 surface of head enlarged : nl< gula ; .j,v;/, gena ; 

 sm, sub-mentum ; W, manclil)le : /, labium ; ///.r, maxillae. 



