^oo 



British Dragonflics. 



rather sharp. They are longer than the upper ones, 

 and all are blackish in colour (Fig. 52). 



Female Imago. 



In the female the blue colour is replaced by greyish- 

 green. The upper surface of the abdomen bears on seg- 

 ments 3 to 8 a bronze-black spot, somewhat conical in 

 shape but with curved sides ; the base of these spots is 

 posterior, consequently the ground-colour is left visible 

 at the anterior part of each segment near the preceding 

 circlet. On the second segment the spot is thistle- 



FiG. 52. — Anal Appendages of Male of Enallagma cvathigerum. 



Dorsal and Ventral View. 

 (After Hager, in De SelyL* "Revue".) 



shaped, while on the ninth and tenth segments it 

 occupies almost the whole of the upper surface. Anal 

 appendages reddish. Vuliuir sea/es rather small. The 

 hind-margin of the eighth segment terminates below 

 in a stout black spine. 



Immature Colouring. 



When newly disclosed the perfect insects are of a 

 dingy yellow colour. In the male this soon becomes 



