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NEUROPTERA. 



A Synopsis of the British Dragon-Flies. 



By Dr. Hagen. 



The object of this paper is to enable the inexperienced 

 collector of Dragon-flies to name readily any species he may 

 meet with in this country ; the special characters which 

 distinguish the species and genera are therefore put pro- 

 minently forward ; and in the characters of the genera and 

 groups, those are made use of which apply to all the 

 British species, even though, in other parts of the globe, 

 species may occur to which the characters here laid down 

 will not rigorously apply. 



The British Dragon-flies are 46 in number ; besides enu- 

 merating these, the characters of several other species not un- 

 likely to occur in Britain are given, in order to facilitate the 

 naming of new British species by those who are so fortunate 

 as to meet with them. These probable British species have 

 no numeral prefixed to their names, which are printed in 

 Italics, not in Capitals. 



