INSECTS. 



87 



u. 



Fig. 58. — Haid and Month-parts of a Gronnd Beetle, enlarged four times. A,^from 

 above ; B. from below, a, labrum ; b, mandible ; /, maxilla with palpi (£r) ; 

 c, labium witb palp (e). 



(1) the generally spherical hip (coxa) (Fig. 59, a) ; 



(2) the very short trochanter (b) ; (3) the elongated 

 thigh (femur) (c) • (4) the shank (tibia) provided with 

 movable spines at its tip (d) ; (5) the three- to five- 

 jointed foot (tarsus) (e), whose last joint ends in claws, 

 and often also in flap-like outgrowths. The Wings are 

 expansions of the skin, which consist of two layers. 

 There are tracheae between the upper and lower 

 lamellae. At first (in the pupa) the wings are folded 



