Identificaciones de nyhofs

Knocked one out of the air earlier the same day and was shocked to see massive red three-cornered "airbags" had emerged from the corners of the pronotum and abdomen. I didn't have my camera with me, but later that day I caught another, and was able to make it "poof" by poking it (although it wasn't as "poofy" as the previous one - and it deflated within seconds after being poked).

Apparently this is something this group of beetles does: https://en.wikipedia.org/wiki/Malachiinae

"Malachiinae have peculiar orange structures along the sides of the abdomen, which may be everted and saclike or withdrawn into the body and inconspicuous."