Fig. 6 in From Spinning Silk to Spreading Saliva: Mouthpart Remodeling in Manduca sexta (Lepidoptera: Sphingidae)

Fig. 6. Labio-hypopharyngeal lobe (lb) of the first instar of MaNdUCa SexTa (medial views of longitudinal cross sections). The spigot (sp) of the first instar is elongate and cone shaped and is connected to the salivarium (spr) via arthrodial membrane (dm = dorsal premento-salivarial muscle, lb = labio-hypopharyngeal lobe, lbr = labrum, lsg = labial gland, md = mandible, pm = prementum, pma = premental arm, spr = salivarium (=silk press), t-pm = tentorio-premental muscle, te-ci = tentorio-cibarial muscle, vm = ventral premento-salivarial muscle).