Ptilodon

1 Cellular sculpture in micropylar area clearly expressed yet poorly defined on remaining egg surface. Micropylar area represented by rosette and 5–8 rows cells (Figs. 109, 110).......................................................... 2

- Cellular sculpture on entire egg surface clearly expressed. Micropylar area represented by rosette and 2–3 rows cells (Figs. 111, 112). Eggs laid in tight single-layer clusters where they are pressed one to another............................ P. hoegei

2 Egg matte-white. Chorion translucent. Cells of most of the egg surface with very narrow, filiform ridges— 0.2 µm and aero-pyles— 1.7–1.9 µm (Fig. 113)................................................................... P. capucina (from Europe to Japan, Korea, China)

- Egg light-yellow, then becoming brownish tinge. Chorion transparent. Cells of most of the egg surface with flat, wide walls— 2.5–3.4 µm and aeropyles— 2.9–3.2 µm (Fig. 114)................................................. ... P. cucullina (from Europe to Volga-Don region in Russia)