Possibly the most common Diogmites in Arkansas. This is Diogmites angustipennis. Also in the hanging position with a fair-sized wasp species. White bearded face, green eyes, long red legs: Diogmites. The dorsal shot on the opening page is this species as well, both showing the three uniform red lines down the back of the thorax. They also often have two faint brownish thin lines down the thorax center that are separated. Very close to D. symmachus and this is still being looked into but as of 2007 no specimens of D. symmachus have ever been found in AR. There is, however, a new species lurking in the mix. Jeff Barnes is defining it. It likely comprises a portion of the Texas Diogmites populations. One specimen from SW AR was this new species as well. The paper is still pending at this time.

Posterior shot also showing the thoracic red shield of three lines. I have found these do sometimes show a slight double dark line in the middle marking. Otherwise has the flying red wedges down the abdomen (seen here through the folded wings) and the blunt red abdominal tip. Green eyes seen here well.

Here is a paler form from my front yard in Round Mountain, Faulkner county. Much less ruddy dorsally on the thorax. Same overall patterning on the dorsum of the shield. These females are big robbers comparatively. Generally much bigger than misellus and missouriensis

Same girl from my yard. Note the high amount of red terminally despite the pale thorax. This would be absent from the new species which may not occur in central AR at all. 

The chin up posture with a fine flower bee. This is a male. Unfortunately those dazzling eyes fade quickly on specimens. And several species have them so they are not diagnostic.

Fall shot with natural light. These guys are happy with top flower perches or on the ground. Very alert when in this ready feed posture. The new species does not show this bright reddish reflecting terminal segments in this position.

Robber takes robber shot. A small riverside male Diogmites angustipennis with a Megaphorus acrus. I had not seen the Megas come down from their field above the river. When they did they ran into the sand patrolling Diogmites.

Another shot showing the terminal segments reddened. This one seemed to be purposefully stripping off wing and scale right after catching this moth. Those black abdominal marks blend into the red wedges on top.

And a female from the Petit Jean Seven Hollows trail in 2015. Several were flying around near the turtle rock openings.   

A shot from TX (again by the highly skilled Greg Lasley) of the species in TX that is being defined as separate from angustipennis. Bromley did not recognize this species and had several species somewhat confused. It is unclear whether symmachus is a true species at this point (at least in TX). Note this female has almost none of the reddish polish of the angustipennis females above on the terminal segments.