Mystery Ant #1 has been identified as Cylindromyrmex godmani. I have been unable to compare my sample with an actual specimen (no godmani males at MCZ and the only one at NMNH was covered in gold and a little hard to compare) but after reviewing the key (de Andrade 1998) I am fairly confident that it is godmani due to the strongly converging frontal carinae, the size, and the petiole with only traces of striae.
Mystery Ant #2 is a Hypoponera male and probably unidentifiable to species. It was good to know, though, cause I have a bunch of these buggers. I sent them all to Shawn Dash who may or may not be able to do something useful with them.
Mystery Ant #3 is a Gigantiops destructor male, which is what I thought it was but I was finally able to find a specimen to compare it to at NMNH.
I will work on adding new mystery ants soon!