Cyrtoxipha columbiana (Columbian Trig) ♀.
 
 
 
Size: approx. 15 mm. Photo: 06/28/14, 5 pm.


In our area there is seemingly only one species in this genus. I couldn't find any additional information on this Columbian Trig (Cyrtoxipha columbiana) with the exception of the UF sound recordings. The small photo shows a male. 
 

 
bug guide:
http://bugguide.net/node/view/162622
UF (with sound files):
http://entnemdept.ufl.edu/walker/buzz/622a.htm