Argia difficilis Selys, 1865Coenagrionidae
Male appendages, dorsal view
Male appendages, lateral view
MaleFemaleMale appendages, dorsal viewMale appendages, lateral view

Male identification:

  • Labrum and postclypeus black.
  • Eyes blue below.
  • Pale markings on thorax and S8-9 purple.
  • S3 with a dorsal triangle one fourth the segment's length; dorsum of S4-7 black. Immatures with pale colors blue.

Female identification:

  • Pale markings on head and thorax blue, becoming dark and obscure with age. Labrum and postclypeus black.
  • Eyes blue-gray below.
  • S2 with a blue dorsal spot; S3 with or without an elongate dorsal triangle; S4-7 black on dorsum.
  • Dorsum of S8-9 black with a little blue at posterior end; S10 black.

Male abdomen length: 27.0

Male hind wing length: 20.0

Female abdomen length: 27.0-28.0

Female hind wing length: 21.0-22.0

Local distribution: Eastern lowlands.

Habitat: Small streams and spring seeps in forest.

Abundance: Common.

Species range: Ecuador, Peru and Brazil

Updated: 27 July 2013

Credits: Text and images copyright by William Haber and David Wagner, 2013