הזיהויים של cheasilidae

Weird Saropogon. I don’t know the genus well, but it doesn’t seem to match up to any of the described species well. Gestalt seems near S. hypomelas or S. bryanti, but it’s quite small (only 12-13 mm), has a quite dark abdomen (though under a microscope you can catch a hint of red cuticle on parts of the basal tergites), only 2 real scutellar bristles (one side only has one socket, the other side has one big and one small sockets), and the mesonotum is more thickly dusty grey pollinose with brown markings. No specimens in the UAIC match this fellow, and the key in Wilcox 1966 doesn’t point to any other likely candidates. Any suggestions?

Specimen in collection and I put a leg in alcohol. I’ll try to go back and find some more— this male was the only Saropogon I saw that day, in a dry wash in deep Sonoran habitat.