BENGTSSON, AN ANALYSIS OF DESCRIB. SCANDIN. EPHEMERtDA. 17 



Cloeon hifidum Bgtn^ im. J^. Of the three specimens, marked 

 as 5, the individual from »Alten et Kautokeino» belongs to 

 Cloeon simile Eat., im. J^ and the two others, which are 

 marked »Muonioniska», are Ephemerella ignita Pod., im. ^. 



5. Eph. vespertina (1. c. pag. 1045. N:o 5). — Zetterstedt 

 himself and almost all of the authors. that ha^e taken iip a 

 position to the species, have identified it withLiNNÉ's species 

 with the same name. Wallengren^ refers it to ^aöro^^^/eö^a 

 fiisca (Curt.) (Potamanthus hrumieus Pict.), probably sup- 

 porting himself on the authority of Hagen^, who says about 

 this species: »I have types of Zetterstedt's species. I used 

 to think them to be identical with Pot. brunnens Pict., but 

 this must be verified». Hahrophlebia jusca (Cctrt.) has, how- 

 ever, not been found in Sweden. — The species is in the 

 collection represented by 1 J* and 2 $, all subimagines, and 

 1 larva. A close examination has in an entirely decisive 

 manner established that all the subimagines, and probably 

 also the larva, belong to Leptophlebia marginata (Lin.). 



6. Eph. brevicauda (1. c. pag. 1045. N:o 6). — Eaton, 

 Wallengren and other modern systematici, as, besides, al- 

 ready Zetterstedt, have identified the species with Ephe- 

 mera brevicauda Fabr. and accordingly determinated it as 

 Ccenis macrura Steph. Both the types, 1 im. $ and 1 subim., 

 belong to Ccenis horaria (Lin.) (= dimMiata Steph.). 



7. Eph. venosa (1. c. pag. 1045. N:o 7). — By Eaton con- 

 sidered as a Siphlurus, it was referred by Wallengren* to 

 Ephemera venosa Fabr. Of the three specimens (»mares») 

 from Lycksele, two belong to Siphlurella Thomsoni Bgtn ^, 

 im. J", while the third is Heptageniadalecarlica Bgtih^, im. J. 

 The female from »Bossekop Finmarkiae» is Heptagenia dale- 

 carlica Bgtn, subim. $. — »Var. b.», represented by 1 J" 

 and 1 5 from »Kautokeino», is Heptagenia dalecarlica Bgtn, 

 im. c??. 



8. Eph. vitreata (1. c. pag. 1045. N:o 8) was interpreted 

 by Eaton as »Leptophlebia cincia Retz.». As to this Wallen- 



^ S. Bengtsson, Neue Ephemeriden p. 109. 



^ H. D. J. Wallengrkn, Förteckn. otc. p. 17 G. 



=* 1. c. pag. 396. 



^ 1- c. pag. 178. 



*" Beiträge p. 11. 



^ Neiie Ephemer. p. 110. 



Arkiv för zoologi. Band 7. N:o 36 



