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2. The life history of Sympetrum sanguineum Müll;Gardner;Ent. Gazette,1950a
3. The life history of Sympetrum striolatum Charp.;Gardner;Ent. Gazette,1950b
4. The life history of Sympetrum fonscolombii Selys;Gardner;Ent. Gazette,1951a
5. The life history of Sympetrum scoticum Donov.;Gardner;Ent. Gazette,1951b