Lacordaire encouraged him to specialize in Elateridae on which he published revisions of which the very rare Monographie of Elateridae (four volumes, Liège, 1857–1863) is important.
Lacordaire recommended that he focus on Elateridae, and he subsequently produced revisions of this family, with a significant contribution being his rare and detailed Monographie of Elateridae (four volumes, Liège, 1857–1863).