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NEUROPTERA. 



Explanation of Terms used by Dr. Hagen in his 

 Synopsis of the British Dragon-flies (ante, pp. 

 39— 60). 



By A. H. Haliday. 



As Dr. Hagen's paper is intended to facilitate the naming of 

 specimens by collectors, it occurred to me that an explana- 

 tion of the peculiar terms used in Libellulology would be 

 very acceptable. I have therefore prepared the following 

 brief explanation : 



