E. Pollard, T.J. Yatesin association with the Institute of Terrestrial Ecology (Natural Environment Research Council) and the Joint Nature Conservation Committee1993
[by] T. G. Howarth. 24 colour plates of adults by A. D. A. Russwurm; 24 colour plates of early stages copied from the originals of F. W. Frohawk by R. B. DavisF. Warne1973