This is intriguing. The markings and body form and stance fit with Nacoleia rhoeoalis. However the antennae don't fit. Nacoleia rhoeoalis has thick red/tan antennae with the end section pale/grey narrower and folded, almost at right angles, forward. Not narrow and thread-like as above. Or is this a gender thing? OK, just checked Common 1990 and this is a female, males have the bent tips. Seems I mostly see males.