346 



ZOOLOGY 



insects with a thin cylindrical abdomen, but an enormous 

 head and thorax. Many of them are strikingly beautiful. 

 The generative organs of the male open on the ninth abdominal 

 segment, but there is a kind of vesicula seminalis on the second 



Fig. 196. 



C. The whole body extricated. 



D. The perfect Insect (Aesolma cyanea), the wings having acquired their full 

 dimensions, resting to dry itself, preparatory to the wings being horizontally ex- 

 tended. 



segment of the abdomen, into which the semen is transferred, 

 and is thence introduced into the females. In some species 

 the female then flies over the water, touching it at intervals 



