Update, July 02 2006: I've added pics from McAllen, Hidalgo county in August 2005, at the bottom.
With many thanks to Dennis Paulson for the site information, these
pics of the very local Golden-winged
Dancer Argia rhoadsi were taken by me at Fort
Clark Springs, Kinney County, Texas on Aug 17, 2004:
In the two entries below, I was able to photograph a male close
to a male Blue-ringed Dancer Argia sedula for comparison.
The cropped original is followed by a merged version fo the two
bugs together; note the slightly larger size of rhoadsi,
its narrower blue abdominal rings, and the rearwards "creep"
of blue dorsally from the basal ring on S3; I also noted that
rhoadsi had a frequent habit of partially opening their
wings (roughly to the position that a Spreadwing holds it wings):-
A male and mature female at McAllen Nature Park, Hidalgo County on August 18, 2005;
This male was one of five (plus one female) seen at Felipe Creek, Del Rio, Val Verde county, Texas in late June 2007: