86 



THE LARVA OK NYMPH 



[CH. 



ridges are placed obliquely, the mesopleurae having grown forward 

 to meet one another in the middle line in front of them. The wing- 

 sheaths (w 2 , w 3 ) nearly always lie parallel and flat along the back 

 of the abdomen, and reach as far as the end of the fourth segment 

 or beyond. In the Cordulegastrinae and Synthemini they are 

 strongly divergent (fig. 33). The metastiymata (sp 2 ) are present, 

 but very small. 



Fig. 33. Larva of Synthemis eustalacta Burm., with divergent wing-sheaths. 



(x2.) Original. 



A 



B. 



fe. tk 



eel 



Fig. 34. A. Hind-leg of larva of Aeschna brevistyla Ramb. ( x 6). B. Distal end 

 of tibia, to shew trident-spines ( x 30). bj breaking- joint ; cl claws ; ex coxa ; 

 / femur; tb tibia; tr trochanter; ts^ts^ joints of tarsus. For explanation 

 of muscles, see p. 208. Original. 



