Enallagvia. 305 



Date. 



Not onl)' is this species one of the earHest to appear 

 in the spring, but it is also one of the last to dis- 

 appear in the autumn. Mr. C. A. Briggs records it as 

 early as April 28, in 1893, at Ockham Common, while 

 in 1897 I saw it at Esher Common as late as 

 September 29. It is, however, possible that there is a 

 second emergence in the latter part of the season, or, 

 at an}- rate, that individuals continue to emerge irregu- 

 larl}- during the summer. 



Habits. 



Ponds, canals, lakes, and streams, where the surface 

 of the water is not too much hidden by water-weeds, 

 appear to be the favourite haunts of this delicateh'- 

 coloured little Dragonfly. Here, amongst the rushes 

 and long grass near the banks, or often, if the sun is 

 shining, over the surface of the open water, the\' may 

 sometimes be seen in swarms. Often, too, numbers 

 may be found sunning themselves on dry land, fl\'ing 

 close to the surface of the ground, and this is the 

 cause, no doubt, why, on Esher Common, so man\' are 

 captured b}" the snares of the Round-leaved .Sundew 

 i Droscra rotuudifolia). This Dragonfly often haunts 

 the same locality as its very close relative, A. puclla^ 

 though one is usuall)' more plentiful than the other. 

 The range of the former, however, is much more 

 extended in the British Isles than that of the latter. 



Distribution. 



Though no localities have been noted for Wales, it 

 may fairh' be assumed that E. cyatJiigej'nm is well 



X 



