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The head and thorax look quite dark in the photo, but as far as I know this is the only species with a dark spot in the middle of the wing. It seems to be a very rare species.
Entomologist and biological recorder
Could be a chance that it is also under recorded. It could, at first glance be mistaken for a somewhat variable in shades Javesella pellucida, which indeed was my first thought until viewed on the monitor. I hasten to add that the latter was also recorded from the same site. Was, unfortunately littorally past tense, as it is within the confines of Boultham Park, Lincoln, which is being stripped bare of many forms of habitat, (another story).
A link to Laodelphax striatellus. My image, (of a male), seems to be a match that of the male depicted on the site. I have also just uploaded what I think is a female L. striatellus. This link shows all of this species on flickr.
An iSpot Project- HELP WITH IDS - UK & Ireland Community - PLANTS
Your second photo looks to me more like the long-winged (macropterous) form of Dicranotropis hamata, compare with this photo from Joe Botting:
But I've asked Alan Stewart who runs the recording scheme for leafhoppers to have a look as well (see the email I've sent you), so we may yet learn more!
Yep, I was a bit to hasty with that one, for with your nudge I to see it is a long-winged (macropterous), Dicranotropis hamata, and has been removed.
Also noted your email. Alan replied directly to me with the hope that I collected a specimen. Oh dear I can see where this is heading :( Ah well we will see what he has to say when I give him the bad news re no specimen collected....
Lat/Lng: 53.2087, -0.55744
OS grid ref: SK964689
The grass habitat where this species was found is now mowed at least twice a month during the summer, early autumn months.