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Isoperla grammatica

Imago  

  -    . . .
  - Order Plecoptera
  - Family Perlodidae
  - Genus Isoperla
  - Species grammatica

The yellow sally (Isoperla grammatica) is an important stonefly for the fly angler, it hatches often in big numbers


Its flying period spans from April to August


Ventral view





Dorsal view detail, notice the typical horseshoe pattern on the head


Detail of the thorax, head and feeding apparatus, ventral view


Abdomen and cerci, ventral view