38 spp. in our area, ~250 spp. worldwide(1)
worldwide, most diverse in Eurasia & Africa; in our area, 11 spp. in the east (of which 4 transcontinental in the north), the rest are western(1)
Some species have been reported parasitizing tiger beetles and megachilid bees.
Nearctic species are revised in:
Marston N. (1963) A revision of the Nearctic species of the albofasciatus group of the genus Anthrax Scopoli (Diptera: Bombyliidae). Tech. Bull. Kans. State U. Agric. Exp. Sta. 127: 1–79.
Marston N. (1970) Revision of New World species of Anthrax
(Diptera: Bombyliidae), other than the Anthrax albofasciatus
group. Smithsonian Contributions to Zoology 43: 1–148. (Full text: low-resolution