GENERAL OBSERVATIONS. 3 



■general character to be noticed here. The six legs are at- 

 tached to the under surface of the thorax, a single pair to 



Fig. II. 



Fig. I 



Fig. I. — Body of an insect (Hymenoptera), showing the principal divisions : 

 A, head ; B, thorax ; C, abdomen ; a, antenna ; c, compound eyes ; m, 

 mandible ; s, simple eyes ; /', prothorax ; d, mesothorax ; k, metathorax ; 

 iW, fore-wing; 2\V, hind-wing; n, coxa; o, trochanter; /, femur; r, 

 tibia ; t, tarsus ; I to 9 segments of the abdomen. 



Fig. II. — Oral and digestive system of Deinacrida megacephala (this insect is 

 drawn on Plate XVIII., fig. 2) : I, mandibles ; 2, maxillse ; 3, labrum ; 4, 

 labium; 5, maxillary palpi ; 6, labial palpi; 8, oesophagus; 9, crop ; 10. 

 gizzard; II, pancreas; 12, stomach; 13, biliary vessels; 14, ilium; 15. 

 colon ; 16, anus. 



each division ; they are composed of the following joints : 

 coxa (Fig. I. n), trochanter (o), femur (p), tibia (r), and 

 tarsus (s). 



