IV] 



FROM WATER TO AIR 



29 



lengthwise down the back, and the head and thorax 

 of the imago are freed from it (fig. 8 a), then the 

 legs clasp the empty cuticle, and the abdomen is 

 drawn out (fig. 8 b, c). After a short rest, the newly- 

 emerged fly climbs yet higher up the water-weed, 



Fig. 8 a, b. Dragon-fly (Aesclma cyanea). Two stages in emergence 

 of fly from nymph-cuticle. From Latter's Natural History. 



and remains for some hours with the abdomen bent 

 concave dorsalwards (fig. 8 d), to allow space for the 

 expansion and hardening of the wings. For some 



