This Isodontia (mexicana?) was vigorously, even frantically, waving his abdomen around and repeatedly sriking it agaist his perch, first a wood rail, then various leaves. At first, I thought it was trying to disloge the Strepsipteran but apparently it was a frass problem. As soon as he cleared the white frass, as seen in pic 4, he stopped waving and striking his abdomen, groomed himself fore and aft for a while, then flew off. Pic 3 shows the Stylopid well. If someone confirms the wasp ID I will post a blow-up of the parasite to the Strepsistera page.