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Stictia cf. punctata
550 msnm +\- secondary rainforest
I only found some old drawings of Monedula sp. and possibly Monedula punctata, which is now in Stictia genus.
http://researcharchive.calacademy.org/re...
Stictia signata:
https://www.flickr.com/photos/miguel1pr/...
So, looking at the markings yours easily might be Stictia cf. punctata.
Must be a Crabronidae, possibly Bembicinae, Bembicini. Not sure what kind of Bembix sp. are around.