Table 1 Examined morphological characters of female Ae. koreicus and Ae. j. japonicus, following the descriptions of Tanaka et al. [1] and Versteirt et al. [5]
| Â | Ae. koreicus mainland | Ae. koreicus Jeju-do | Ae. j. japonicus |
|---|---|---|---|
Differentiation of Ae. koreicus from mainland Korea and Jeju-do island (Tanaka) | |||
 Fork scales | Entirely dark, max. 4 pale scales | With pale scales (1–3, up to 10) | Often entirely dark |
 Antepronotum | Broad pale scales | Pale falcate scales | Broad pale scales, occasionally few falcate scales |
Differentiation of Ae. koreicus from mainland Korea and Jeju-do island and Ae. j. japonicus (Tanaka/Versteirt) | |||
 Pedicel scales | More pale than dark scales | Dark, dorsal and lateral pale spots | More dark than pale scales |
 Hind tarsomere IV | Pale basal band | Pale basal band | Usually dark |
 Hind tarsomere V | Usually dark | Pale basal band | Usually dark |
Differentiation of Ae. koreicus and Ae. j. japonicus (Tanaka) | |||
 Postpronotum | Usually with dark scales | Usually with dark scales | Usually without dark scales |
 Subspiracular patch | Present | Present | Absent |
 Costa | Entirely dark | Entirely dark | Ventrobasal pale or grey scales |
 Hind femur | Base entirely pale | Base entirely pale | Dark subbasal band |