The system followed is that of Dr. Andrej L. Ozerov, taxonomic specialist for Micropezidae for Fauna Europaea and Dr. Paul Beuk (webmaster of Diptera.info) who acts as specialist for the Psilidae.
Deviations from their lists are minor, the adoption of Imantimyia as a genus name for several of the Loxocera comes about as a result of a revision:
Buck, M., & Marshall, S. A. (2006). Revision of New World Loxocera (Diptera : Psilidae), with phylogenetic redefinition of Holarctic subgenera and species groups. European Journal of Entomology, 103, 193–219.
The system is consistent with all published papers listed here though one should exercise caution with the names used in older papers. For reasons of ease of navigation through the taxonomic tree, some subgenera names may be omitted.
Several authors have commented that the Genus Chamaepsila is in need of revision.
I am indebted to the UK's Diptera taxonomy specialist, Dr. Peter Chandler, for assistance in locating papers. If I've missed even one then please contact me.