1). 1851 Abbey Pool, Tresco, immature, shot, late August.
(E. H. Rodd, Zoologist 1851: 3280; "D.W.M." Zoologist 1852: 3466; Newman, 1866; E. H. Rodd, Zoologist 1870: 2322; Harting, 1880; Yarrell, 1871-85; R. W. J. Smart, Transactions of the Penzance Natural History Society 1888: 177; J. Clark & F. R. Rodd, Zoologist 1906: 342; Witherby, 1920-24; Penhallurick, 1969).