Closely related to Conophorus collini , but generally larger, and has a non-sulcate scutellum (convex, without median groove or gap).
Western U.S.: AZ,CA,ID,NV,OR,UT,WA
Mexico: Baja California Norte, and B.C. Sur
Spring; late February to June.
Adults visit, and have been sampled at, a number of spring wildflowers, such as Cryptantha intermedia, Lasthenia, and Plagiobothrys.
Section on the genus Conophorus, in Homeodactyla and Asilomorpha , by J.C. Hall and N.L. Evenhuis. 1981. In Griffiths, G.C.D. (ed.): Flies of the Nearctic Region. Vol.V, Part 13, No. 7, Bombyliidae.