what key do you use for this genus?
Oh, just remember, you had wanted to find the reference for the Thyridanthrax miscellus . That's an important detail I'd like to include on the INFO page.

Thanks for the reminder about T. miscellus. I had forgotten. Regarding Paravilla, I use the 1980 Hall revision. P. syrtis is so common that I've come to recognize it like a familiar face.

While making breakfast this morning I thought that I probably should have asked "or have you seen so many of this sp. that ID recall is automatic?". Then I turned on the computer ...
Looking forward to the T. miscellus citation.

While watching Diadasia bees yesterday I also noticed several opportunistic bombyliid visitors, incl. a Paravilla . At one point I heard a familiar sounding whine-buzz, thought Bombylius , looked in that direction, and there she was going through the motions of flicking eggs at a bee burrow. No photos yet of the Bombylius , though I'll post some later of the other one (at least they sit down at times).

I wouldn't be surprised if the Paravilla turns out to be P. tricellula. I often find it around digger bee "colonies". They are very easy to ID; they have an extra cell in the wing like Exoprosopa.
-Ciao

P. tricellula is mentioned by Hull as the parasite of Diadasia bituberculata (1). The genus Paravilla generally seems to have a parasitic relationship with Diadasia bees. Since the Hull tome (1973) there are probably newer studies on parasite-host relationships regarding this genus.
I just posted one of the Paravilla , no third submarginal, but an odd vein spur off the anterior branch of the 3rd vein.