Nanna time has started and sweeping around grassy field edges last week I took a couple which key to N. tibiella. Ball's key says both tibiella and fasciata are common, but I only have a couple of records of tibiella against hundreds of fasciata. The female (first two pics) I am happy with, but the male (last three pics) has characters of both fasciata and tibiella. Based on the length of the cross-vein to postical vein ratio, it should be tibiella, but it has posterior ventrals on the front tibiae, which is supposed to be a character of fasciata. The 5th sternite feature maybe suggests tibiella. Is that fore tibia chaetotaxy feature correct?
Ian
Spent a while neatly arranging the pics...all undone when the post was saved!