Some heavily cropped shots of the male terminalia included. Form of the superior appendages is hard to make out but the inferior appendages are moderately elongate and slender without a hooked apex (in lateral view) and appear to be divergent in dorsal view, excluding L. brevicauda and most consistent with L. conjuncta. Form of the basal wing venation eliminates L. barbarae as a contender.

I didn't get close to this female because I was scared the water was too deep (turns out it was "only" hip-height). I think the males were bright red and I got some ordinary photos there a couple of days later.