FIGURE 4. a in Neohemigaster Malloch, 1939 and Pterogenia Bigot, 1859 (Diptera: Platystomatidae) from eastern Eurasia, with the description of four new species

FIGURE 4. a—Pterogenia hamifera Frey, 1930, wing (from Frey's figure 3, Taf. 1); b—Neohemigaster minuspicta Hennig, 1940, wing (Typus); c—Neohemigaster flavopicta Hennig, 1940, wing (Typus); d— Neohemigaster ornata Hennig, 1940, wing (Typus).