This one I had to chase around until I got a decent shot. A female Widow Skimmer (Libellula luctuosa) has none of the bright whiteness of a male, but her abdomen is stylish and she has nice racing stripes.
This one I misidentified at first as a Baskettail, but a second look at the eyes made me think Emerald, and I was right. Emeralds rarely perch so it's hard to get a good ID on them, but I'm pretty sure this is a Somatachlora cingatum, a Lake Emerald. They usually live a bit farther north but it has been a cool Spring. Any better eyes can give me a better ID if I'm wrong.