According to the Hemipenthes genus page, its name means "half veiled in black", a good description of the wing pattern. They range from 6 to 12 mm (mine was 9mm) and have short metallic hairs on the thorax and/or abdomen. Like other members of the bee fly (Bombyliidae) family, they are ectoparasitoids, laying their eggs near the eggs or larvae of solitary bees, beetles, wasps and other insects. The bee fly larva lives off the victim, eventually killing it.
|Halteres - REK|
Xenox tigrinus. Like other members of the family, it doesn't sting or bite. We don't even know what the adult eats! The good news for homeowners is that it specializes in parasitizing carpenter bees.
Carpenter bees drill smooth holes in wood to lay their eggs in, and have been working on our cabin beam. Fortunately they don't cause significant structural damage and they are good pollinators. Still, if the Tiger bee fly wants to feed its young, I will send it our address.