Invertebrate eggs on rush stem
No interactions present.
For comparison, see also my observation of unknown eggs at:
Entomologist and biological recorder
Ta for that - handy for comparison with the arrangement in Atylotus which has the eggs more or less perpendicular to the stem; Tabanus has them more angled and I suspect is indeed the genus in the linked observation.
I don't have the RES handbook you mention, but in Stubbs and Drake, "British Soldierflies and their allies", they bunch together the three horsefly genera Atylotus, Hybomitra and Tabanus, saying that all three lay egg masses of three or four layers at an angle of 45-50 degrees to the substrate. They also say that the eggs are pale milky-white/yellow when first laid, soon darkening to dark grey or deep black.
Indeed - I've looked there too but there's just something about the 'jizz' of it, mainly the more perpendicular angle which still feels right for Atylotus... however, I've added a revised and more definite i.d. of Tabanidae to sit alongside the more speculative species-level one.
Thanks for the ID. I've already made tentative arrangements for a return visit to the site with some proper dipterists... preferably with exposed arms to act as bait.
Biodiversity Officer - Shropshire
Looking forward to seeing if I was right or not! Often worth checking if possible otherwise the rarities/scarcities don't get recorded.
Lat/Lng: 52.5, -2.9
OS grid ref: SJ4200