Female Eastern Tiger Swallowtail -dark morph

Here is the cheat sheet I use to tell the 4 dark swallowtails apart: http://louisiananaturalist.blogspot.com/2009/06/four-dark-swallowtails.html

Black swallowtails have a second row of yellow dots. On the underside (ventral they will have a second row of orange dots. The dark female form of an eastern tiger does not have these extra rows of yellow or orange dots. Dots only below the blue. Hope this helps.