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Dear all,
The two photos by Fernando Pires are Nephrotoma suturalis wulpiana.
Nephrotoma ferruginea and N. s. wulpiana are Nearctic species that recently have become known from the south of the Iberian Peninsula (Hancock et al., 2015b on N. ferruginea, and Hancock et al., 2016 on N. s. wulpiana; both papers available as PDF from the CCW (ccw.naturalis.nl)).
N. ferruginea is known from southern Spain and N. s. wulpiana from Spain (Valencia) and Portugal (Algarve).
N. ferruginea has two small spots at the upper side of the lateral thorax (fig. 5 in Oosterbroek 1984, PDF also available). N. s. wulpiana has only the upper one (as on the two above photo on Diptera-info).
In N. s. wulpiana the posterior end of the mid-dorsal thoracic stripe is darkened and continues into the thoracic suture (this is more or less visible on the two photos).

All the best,
Pjotr Oosterbroek

Photos on Diptera-info of N. s. wulpiananfrom Spain (Valencia) at: https://diptera.info/forum/viewthread.php?thread_id=78626&highlight=nephrotoma+ferruginea&pid=328816#post_328816