FIGURE 3. Pherbellia limbata, immature stages. A in Biology and immature stages of Pherbellia limbata (Diptera: Sciomyzidae), a parasitoid of the terrestrial snail Granaria frumentum

FIGURE 3. Pherbellia limbata, immature stages. A, first-instar larva, cephalopharyngeal skeleton. B – C, second-instar larva: B, anterior spiracle; C, cephalopharyngeal skeleton. D – J, third-instar larva; D, anterior spiracle; E, cephalopharyngeal skeleton; F, epistomal sclerite and parastomal bars fused; G, mouthhook; H, ventral arch; I, ligulate sclerite; J, hypostomal sclerite. Bp, basal piece of mouthhook; a-b and c-d, distances to calculate the indentation index (ab / cd x 100); Db, dorsal bridge; DC, dorsal cornu; Dw, dorsal window; ES, epistomal sclerite; HS, hypostomal sclerite; LS, ligulate sclerite; MH, mouthhook; pa, papillum; PB, parastomal bar; PS, pharyngeal sclerite; VA, ventral arch; VC, ventral cornu; Vw, ventral window. Scales in millimeters. Drawings by J. Nerudová-Horsáková