Key to the species of Neadysgonia

1. Forewing with postmedial line well defined and with one or two points directed to wing margin................................................................................ 2

– Forewing with postmedial line not well defined, broad, with at most a vague point directed to base of apical mark............................................. N. similis

2. Single point on well defined postmedial line directed to base of apical spot.. .............................................................................................. N. consobrina

– Two well defined, well separated points on postmedial line ........................ 3

3. Male .......................................................................................................... 4

– Female ....................................................................................................... 5

4. Medial projection of tegumen at least 1/2 length of costal margin of valva... .................................................................................................... N. smithii

– Medial projection of tegumen less than 1/2 length of costal margin of valva.... ............................................................................................................ N. telma

5. Lateral edge of lodix separated from main plate by less than width of base of lateral projection of lodix ............................................................. N. smithii

– Lateral edge of lodix separated from main plate by distance greater than width of base of lateral projection of lodix ...................................... N. telma