A E Ea.ton, 



Trans. Linn.Soc.Ser.B.Zool.Yol.IILPij.S&. 



inopiTiatus 



3 aolidos 



H coiLSuetus 



A. E. Eaton del 



Hollicklitlv West^Wewmari imp 



l.UI.EPTUS. 2-3, IKON 4-5, CINYGMA. 6, RHITHROGENA (Nymph). 7, BPBORUS. 



P Nameless. 9, F, PHEMERE,i.LA . 10-11, BAETIS . IP., CENTROPTILUM. 13, AMELETUS. 



