Since it seems like she was dressed up for this photoshoot, and as she's wearing a fez with egyptian styled makeup, I wonder if Alcala had her dress up in a Eastern way (Egyptian/Moroccan). Going by his other pics when he has Oriental-Japanese geisha statues in the background of girls he took a picture of, and that story about him trying to make a 13 year old girl he brought to his apartment to wear a Oriental outfit (I forgot whether or not if it was a kimono, or something), I am thinking this goes in pattern with his apparent sexual fascination with Orientalistic themes and garb.
Also wonder if there's a racial aspect to it too, because while Alcala is Mexican most of the girls he took pictures of were non-Mexican, with many of them being blondes. So I am guessing he has a thing for the "exotic".
this doesn't really help much with identification, but I thought it was an interesting thing to observe.