On the morning of June 19, 2006 I was exploring the margins of Double Lake Recreation Area, Sam Houston National Forest, San Jacinto County, Texas, where I came upon a number of emerging teneral damselflies. I initially identifed these ones as Attenuated Bluets enallagma daeckii. Update, October 2007: Nick Donnelly has confirmed that these are Attenuated Bluets, E. daeckii. :
A male:
A female:
Update June 20, 2009: this immature male was at the Beaver Pond close to Lake Sam Rayburn, Jasper county in early June 2009: