Psychoides

Yesterday, I revisited the site, at which I found the Psychoides (see my previous post) and on examining a couple of larvae, I am now convinced that the species involved is filicivora, which is a new species for me. Today, I took a look at two larvae in my garden. One was on a Polystichum aculeatum variety and the other on Asplenium scolopendrium. Both seemed to be P. filicovora, which is a bit of a mystery because the only adult Psychoides I've seen in the garden were P. verhuella, which begs the question; do adults of P. filicifora always have the pale tornal spot or do I have both species in the garden? I certainly do not intend disturbing every larva I can find to answer this.