This appears to be a female Familiar
Bluet Enallagma civile from my yard in western
Tarrant County (Fort Worth), Texas. A couple of features seem
to match the subtle distinctions described at John Abbott's Field
Guide for Atlantic Bluet Enallagma
doubledayi: The pale antehumeral stripe is thinner
than the black humeral stripe for almost the entire length; there
is a trace of blue along the mid-dorsal carina:
