Argia talamanca Calvert, 1907Coenagrionidae

Male identification:

  • Dorsum of thorax blue with a narrow black line on carina.
  • Extensive pale areas bordering underside of eyes.
  • Brown streaks on sides of S3-6.

Female identification:

  • Pattern on head as in male, except postclypeus all black.
  • Antehumeral stripe a little more than half the width of mesepisternum.
  • S3 with a long blue triangle on dorsum, S4-7 with a blue basal ring, S8 all blue on dorsum, dorsum of S9 with a blue middle stripe, S10 black.

Size: Small

Body length: 34.0

Local distribution: Southern Pacific lowlands to 700 m, Peninsula de Osa.

Habitat: Small streams in forest, especially where water flows down rock walls.

Species range in Middle America: Costa Rica

Male body length: 34

Male abdomen length: 26-27

Male hindwing length: 20

Female body length: 34

Female abdomen length: 26

Female hindwing length: 22

Updated: 21 August 2012

Credits: Text and images copyright by William A. Haber, 2006-2011. Contact: