● Quadrilateral cell of hindwing more than 1.15 times, usually 1.3-1.5 times longer than that of forewing
b ↑
Lestidae: Key couplet 2 of 15
● Front of synthorax unicolorous or striped, the stripe not expanded near centre ● Ac generally near Ax1, basal or distal, occasionally almost midway between Ax1 and Ax2
⇒ genus: Austrolestes
b ↑
Lestidae: Key couplet 5 of 15
● Central part of pterostigma overlying one or more crossveins of adjoining row ● Ac closer to level of Ax1 than of Ax2, sometimes basal to Ax1 ○ Abdominal tergum 2 with well-defined light and dark pattern, sometimes like that of dark A. insularis (see above), or substantially dark
b ↑
Lestidae: Key couplet 6 of 15
● Pale humeral stripe narrow, with at most a small upper patch extending across mesopleural suture, not meeting subalar ridge
b ↑
Lestidae: Key couplet 8 of 15
● Humeral stripe not extending across mesopleural suture
b ↑
Lestidae: Key couplet 11 of 15
○ Abdominal tergum 2 without pale basal spot ● Superior appendages of male forcipate, converging at tips
b ↑
Lestidae: Key couplet 12 of 15
○ Abdominal tergum 2 without pale mid-dorsal stripe
b ↑
Lestidae: Key couplet 13 of 15
● Ac distal to Ax1 in forewing ● Abdominal terga 3-7 of male substantially dark, with pale basal rings
b ↑
Lestidae: Key couplet 14 of 15
● Pale ring at base of abdominal tergum 7 occupying approximately 10% of length of segment, or less
b ↑
Lestidae: Key couplet 15 of 15
○ From south-western Australia ● Dorsal mark on abdominal tergum 2 of male strongly constricted at centre, forming narrow stem
⇒ species: Western Ringtail (Austrolestes aleison)