Figure 4 from: Matushkina N (2011) Sting microsculpture in the digger wasp Bembix rostrata (Hymenoptera, Crabronidae). Journal of Hymenoptera Research 21: 41-52. https://doi.org/10.3897/jhr.21.873

Figure 4 - SEM morphology of the sting: A lateral view of sting with the furcula and venom duct B basal part of the sting C valvilli on the first valve positioned in the bulb of the second valve, medial view D ventral view of isolated second valve showing the bulb E lateral view of sting apex showing scattered sensilla-like structures on both valves and two subapical ridges on the first valve F single wrinkled sensilla-like structure that superficially resembles the secretory pores described by Nenon et al., 1995 (note characteristic contamination around the pore). Arrowheads indicate the position of the opening of the venom duct (in D) and the subapical barbs (in E). Scale bars: 200 μm in A; 100 μm in B and D; 30 μm in C and E; 300 nm in F.