[1] For many years he self-published the journal Fragmenta Dipterologica, for which he was almost the sole contributing author.

[2] In 2005, Lehrer reclassified the genus Bengalia into 11 new genera in 4 subfamilies[3] within a newly designated family, Bengaliidae.

At present, major sources of Dipteran taxonomy do not recognize Lehrer's 10 new genera as valid, nor the 18 new species treated as invalid by Rognes (e.g.[5]).

[6] This dispute reflects that at present, there is no consensus as to the best way to subdivide the Calliphoridae, which many authorities acknowledge is not a natural group (in this case, polyphyletic); the BioSystematic Database of World Diptera, for example, states "The Calliphoridae are marked as a polyphyletic group of convenience as at the present we are unwilling to reduce the Oestridae to a subordinated group within a monophyletic Calliphoridae nor to elevate a number of other groups (Polleniidae, Helicoboscidae, and Bengaliidae) so as to properly delimit both Calliphoridae and Oestridae.

"[2] Similarly, the dispute at the generic level is that some of Lehrer's genera are paraphyletic, and, additionally, that they are based largely or exclusively upon features of the male genitalia, and it is therefore impossible to identify most female specimens to subfamily, let alone genus[4] (the rejection of Lehrer's subdivisions therefore being both taxonomic and a matter of practicality).