I saw a lot of albicans aragonensis in Aragón. These looked very white in flight and pale silvery blue when settled. The discal area of the forewing had very fluffy androconial scales, like a white towel. Here are a few shots:


(Those androconia look smoother)

The undersides were very pale:


At one site, though, there were several individuals that looked distinctly blue in flight - almost like a chalkhill blue - though otherwise very similar to aragonensis, and these had darker undersides. I thought at the time I was looking at hispana but am not so sure now. I think they might have been just darker forms of aragonensis. Here are the upperside and underside of the same individual:


My inclination is to think I didn't see hispana (and if in doubt I always apply Occam's razor). Any thoughts would be appreciated.
Guy