Identification key to the species of the genus Thalpomena

1. Hind wing with strong fascia.............................................................................2

1’. Hind wing with a very faint or no fascia (Fig. 2C)................................................ T. coerulescens

2. Fascia of hind wing with a basal ray (Fig. 2A, 2E)............................................................ 3

2’. Fascia of hind wing without basal ray (Fig. 2B, 2D).......................................................... 4

3. Hind wing with a strong and regular fascia almost reaching the lower margins of the hind wing. Apex of hind wing not darkened. Body broad and sturdy (Fig. 2E)........................................................... T. viridipennis

3’. Hind wing with a unregular, faint or small fascia almost reaching the lower margins of the hind wing. Apex of hind wing can be darkened (Fig. 2A)......................................................................... T. algeriana

4. Fascia of hind wing is not reaching the upper margins of the wing (Fig. 2D)............................... T. dernensis

4’. Fascia of hind wing is not reaching the lower margins of the wing (Fig. 2B)............................ T. azureipennis