Figs 17–22 in Morphology, taxonomy, distribution and relationships of the Afrotropical genus Isomerocera (Diptera: Stratiomyidae)

Figs 17–22. Isomerocera heteraspis James, female: (17) scales on postocular area. I. quadrilineata (Fabricius), female: (18) (a) hairs and (b) scales on presutural area of scutum; (19) male posterior stigma (ps – posterior spiracle); (20) postpronotal callus and anterior stigma (as – anterior spiracle, ppc – postpronotal callus); prealar prominence of (21) male and (22) female.