DRAGON-FLIES, ETC. 215 



mate are mentioned by De Selys. That called 

 Ucemorrhoides is found along the shores of the Medi- 

 terranean, and as far north as Lyons, which appears 

 to be its extreme limit; and there are varieties in 

 Spain, Italy, Algeria, and Asia Minor, all of which 

 have received names as distinct species, though 

 proved by connecting links to be merely varieties. 

 The green variety named Ludovicianum by Leach, 

 and described by De llambur as of the " richest 

 metallic green," is perhaps the same as the one I 

 have placed in Plate VI. No. 6, which was, how- 

 ever, taken in England, where the species is, I con- 

 ceive, also subject to vary in different localities, as 

 I have found the males occasionally with green 

 bodies like the females, instead of being of the ordi- 

 nary blue. Some of the southern varieties have the 

 opaque blue extending entirely to the tip of the 

 wing, instead of leaving the small open space as in 

 the English species. 



The larva of Calopteryx Virgo,* as represented 

 in Plate VI. No. 3, is much more slender in form 

 than that of Libellula Depressa,* belonging to one of 

 the first divisions of this beautiful family of insects, 

 which in its broader and flatter and shorter body cx- 



* For some account of the structure of these larva see 

 Chapter V. page 71. 



