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I understand you want an answer. My problem with this creature is that it in no way looks like a Cyrtopogon. When you read the text of Loew it says that the legs should be entirely black and also the beard should be black with some white bristles. Engel describes heydeni castellanus and that has a white beard and only the base of the tibiae is red.

The legs of your creature are too red and the overall appearance looks like no Cyrtopogon. Both Engel and Loew refer to that by mentioning that it should look much like a female Cyrtopogon lateralis: http://www.robberflies.info/keyger/htmle/cyrlat.html

It seems you have collected the creature and maybe pictures of wings, abdomen both dorsal as ventral would help.

I think it is yet a different genus but do not know which. : (