Interesting, that the website list for my county differs from the regional checklist of the local butterfly club. For Duskywings, each list has an inclusion and exclusion that the other doesn't. I don't have a clue as to which might be more reliable.

I'd be inclined to look at all candidates, but focus on the local source. (The "bible" here in Orange County, California is a 30-year-old book, published locally. Two drawbacks are that scientific [!]names have changed and that a few new butterflies have taken up residence. Remarkably, none of the old guard has vanished, as far as I can tell.)

...would point to Juvenal's. The checklist has three, the Dreamy, Juvenal's and Wild Indigo. The Dreamy is listed as "special interest", so that's less likely. The flight times per my field guide indicate a much higher incidence of Juvenal's at this time of year, so I'd give it the nod, although I can't make a good guess based on illustrations.

Don't feel obligated to respond, I'm not looking to draw you into a long conversation.

Thanks again.