Is it possible to tell between species by looking at male appendages as in the enlarged photo, if so which species is this?
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OK, thanks I was confused about which had the curved as opposed to parallel calipers (and exactly which bit they were). See also
try collins insects of Brit. & W. Europe,
M. Chinery, has good line drawings
Lat/Lng: 52.20241502313, -1.110095501208
OS grid ref: SP609563