Eusynthemis aurolineata

Variable Tigertail (Eusynthemis aurolineata)

Inhabits montane swamps and small streams

© 2011 DECCW, NSW; 2021 Ian Endersby and DragonflyPix.com

• Synthemistidae: Key couplet 1 of 26

• ○ Dark markings, if present, confined to basal parts of wings

• Synthemistidae: Key couplet 2 of 26

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• ● Generally two to five crossveins in median space of all wings

• Synthemistidae: Key couplet 9 of 26

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• ● An accessory thick antenodal in forewing in addition to the two primaries; this and the two previous alternating with thin antenodals
  ○ Male tergum 10 without pale dorsal cone
  ○ Ovipositor, if developed, not reaching beyond segment 9

• Synthemistidae: Key couplet 11 of 26

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• ● Anterior frons pale, or pale with black stripe, often quite broad, in midline

• Synthemistidae: Key couplet 12 of 26

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• ○ Frons broad
  ○ Membranule of both wings well developed
  ● Female ovipositor reduced to vulvar lamina or poorly developed
  
  ⇒ genus: Eusynthemis

• Synthemistidae: Key couplet 14 of 26

• ○ Labrum black

• Synthemistidae: Key couplet 16 of 26

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• ● Intermediary piece brown or black

• Synthemistidae: Key couplet 22 of 26

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• ● Superior appendages of male not longer than width of abdominal segment 10
  ○ Non-tropical species

• Synthemistidae: Key couplet 24 of 26

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• ● Metascutum dark brown to black

• Synthemistidae: Key couplet 25 of 26

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• ● Front of synthorax with pale stripe, broad or narrow, near outer margin, or rarely missing
  ● Anterior lateral stripe of synthorax wide, posterior stripe distinctly curved
  
  ⇒ species: Variable Tigertail (Eusynthemis aurolineata)