Chthonolasius sp.

Verheyde, Fons, Jacobs, JEffrEY, Dekoninck, WOUTEr, Achterberg, Kees Van, Rond, JErOEn, Blanck, Tim De, Schoonvaere, KarEL, Nieuwenhuijsen, Hans, Ketelaere, Augustijn De, Minnebo, BarT & Ferrer-Suay, Mar, 2023, Remarks on Hymenoptera on urban green roofs in Belgium, Belgian Journal of Entomology 140, pp. 1-37 : 12

Chthonolasius sp.

BELGIUM: • 1 ♂; N51.125° E4.260°; viii/2020; J. Jacobs leg.; coll. RBINS; pitfall trap; T. De Blanck & W. Dekoninck det. • 2 ♂♂; N51.125° E4.260°, N51.225° E4.380°; ix/2020; J. Jacobs leg.; coll. RBINS; pitfall trap; W. Dekoninck det. [3 occ., 2 roofs]

Remarks:

Males of the subgenus Chthonolasius -which are temporary parasitic species of Lasius s.str. species- are very difficult to identify based on morphology alone. These males might belong to the species Lasius umbratus of which several gynes were found on other roofs.