The genus was first created in 1896 by
Charles Joseph Gahan for the single species Lahejia cinerascens, which was collected by Lieutenant-Colonel
John William Yerbury from
Lahij,
Yemen (spelled as "Lahej" in the paper).[1] In 2002, Stefano Zoia determined that Pseudomalegia (a genus created by
Martin Jacoby in 1897) was a synonym of Lahejia, transferring to the latter genus six more species (while a seventh became a synonym of L. cinerascens).[3] In 2010, two further species were moved to the genus from Microlypesthes and Malegia in the sixth volume of the Catalogue of Palaearctic Coleoptera.[6]
^Moseyko, A. G.; Sprecher-Uebersax, E. (2010).
"Eumolpinae". In Löbl, I.; Smetana, A. (eds.). Catalogue of Palaearctic Coleoptera. Volume 6. Chrysomeloidea. Stenstrup, Denmark: Apollo Books. pp. 619–643.
ISBN978-87-88757-84-2.}