he van der Vecht and Richards’ glands, found only in certain eusocial wasps in the Vespinae and Polistinae subfamilies, are located on the underside of the abdomen. Shown here is an external side view (A) of the posterior abdomen of a Vespa soror worker. The black rectangle indicates the approximate area shown in microscope view (B), where dotted ovals indicate the gland locations. (S5 and S6 indicate metasomal sternites 5 and 6.) (Image originally published in Mattila et al 2021, Annals of the Entomological Society of America)