BENGTSSON, AN ANALYSIS OF DESCRIB. SCANDIN. EPHEMERIDA. 3 



lich bei den grossen Feuerbriinsten Kopenhagens öder dem 

 Bombardement untergegangen». 



Except the collections, just mentioned, I have had an 

 opportunity — by the kind obligingness of Mr. O. Gylling — 

 of examining the late Rev. H. D. J. Wallengren's collec- 

 tion of Swedish Ephemerida, kept in the Museum of Malmö, 

 upon which collection Wallengren's paper »Förteckning på 

 de Ephemerider, som hittills blifvit funna på Skandinaviska 

 halfön. Entom. Tidskr. Årg. 3. 1882. p. 173-178» is based, 

 and I have thought it to be of interest to add the results 

 of this examination too. 



The results, to which I have come by this study, differ 

 in many points from the current opinion, not only as regards 

 more critical species, but in several cases also in such species, 

 the determination of which has hitherto been rather un- 

 animous. As a stating of the reasons, upon which I have 

 based my opinion, may appropriatly be made in a separate 

 paper, I now venture to present my results, in the hope, that, 

 at least in some cases, a clearer light may be thrown upon 

 the Scandinavian species of this group, described by the 

 older authors. 



I. v. Linné. 



1. Ephemera vulgata (Fauna Suec. Ed. II. p. 376. N:o 

 1472. — Systema Naturse. Ed. XII. p. 906. N:o 1) is the spe- 

 cies so named by all låter authors. 



2. Eph. marginata (Syst. Nat. Ed. XII. p. 906. N:o 3). — 

 This species seems, remarkably enough, not to have been 

 known by Linné as a Swedish one, as it is not mentioned 

 in Fauna Suec. In Systema Nat. Linné only says, concerning 

 the spread of this species, as for the other species, »habitat 

 in Europa», but, in this case, he relies on Fabricius, which 

 he does not in the statement of the locality of all the other 

 species. Fabricius, who in Entomol. System. Tom. II. p. 69 

 for his yymarginata^^ quotes Linné's species with the same 

 name as synonymous, says about it »habitat in Sueciae 

 aquis», and as the description cannot be applied to any other 

 species, occurring in Sweden, than Leptophlebia marginata 

 auct., it must be regarded as the species in question. — 



