Subfamily GEOMETRINAE

Key to genera

1. Frons green, yellowish or white.......................................................................... 2

- Frons brown, often almost black......................................................................... 5

2. Tornus of forewing and apex of hindwing with small rust coloured spots (Fig. 16C).......................................................................................... Comibaena Hübner, 1823 (amoenaria Oberthür, 1880)

- Wings without rusty spots on forewing tornus and hindwing apex............................................... 3

3. Hindwing venation: М3 and Cu1 stalked (Fig. 4A)............................................ Jodis Hübner, 1823

- Hindwing venation: М3 and Cu1 not stalked (Fig. 4B)........................................................ 4

4. Termen of hindwing wavy (Figs. 4B, 15D).................... Geometra Linnaeus, 1758 (papilionaria Linnaeus, 1758)

- Termen of hindwing smooth (Figs. 16A, 16B)........................................... Thetidia Boisduval, 1840

5. Hindwing distinctly lighter than forewing, whitish (Fig. 18B)...... Dyschloropsis Warren, 1895 (impararia Guenée, 1858)

- Hindwing not lighter than forewing....................................................................... 6

6. Fringes chequered, termen of hindwing jagged or with acute angle at М3 ......................................... 7

- Fringes unicolorous, termen of hindwing rounded or with obtuse angle at М3 ...................................... 8

7. Palpi short, not projecting beyond frons; antenna of male shortly bipectinate; in male sternite A3 without setal patches; hindtibia of female with pair of spurs............................................................ Thalera Hübner, 1823

- Palpi longer: extending beyond frons; antenna of male filiform; in male sternite A3 with paired setal patches (Fig. 5E); hindtibia of female with two pairs of spurs.............................. Hemithea Duponchel, 1829 (aestivaria Hübner, 1799)

8. Antennae of both sexes filiform, ciliate; hindtibia of female with pair of spurs................. Chlorissa Stephens, 1831

- Antennae bipectinate in male, shortly bipectinate in female; hindtibia of female with two pairs of spurs.................................................................................................. Hemistola Warren, 1893