ONH

Shield-backed Katydid nymphs

Steiroxys sp.

  • 2154
  • 2152
  • 1vstack1
  • sidestack1
  • 4235
  • 2212
  • 2245
  • 2398
  • 2416
  • 2557
  • 2154
    1 - Shield-backed Katydid nymph, Steiroxys sp.

    08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2152
    2 - Shield-backed Katydid nymph, Steiroxys sp., same individual as in slide 1.

    08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 1vstack1
    3 - Shield-backed Katydid nymph, Steiroxys sp., lab photo of the ventral abdomen, showing the nymphal ovipositor. Same individual as in slides 1 and 2.

    Collected 08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • sidestack1
    4 - Shield-backed Katydid nymph, Steiroxys sp., lab photo of the ventral abdomen, showing the nymphal ovipositor Same individual as in slides 1, 2 and 3.

    Collected 08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 4235
    5 - Shield-backed Katydid nymph, Steiroxys sp.. Body: 11 mm ovipositor: 2 mm. Lab photo.

    Collected 08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2212
    6 - Shield-backed Katydid nymph, Steiroxys sp.

    08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2245
    7 - Shield-backed Katydid nymph, Steiroxys sp.

    08/04/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2398
    8 - Shield-backed Katydid nymph, Steiroxys sp.

    08/15/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2416
    9 - Shield-backed Katydid nymph, Steiroxys sp., same individual as in slide 7.

    08/15/2009 Obstruction Point Area, Olympic National Park, Washington

  • 2557
    10 - Shield-backed Katydid nymph, Steiroxys sp., same individual as in slide 6.

    08/15/2009 Obstruction Point Area, Olympic National Park, Washington

Beginning August 02, 2009, we photographed and collected nymphs that appear to be the same Steiroxys species. The nymphs are abundant in scattered vegetation in the Obstruction Point Area, Olympic National Park.

The photos are roughly in order of increasing ovipositor length, which corresponds to increasing body size with each instar. The nymphs also show increasing definition of the characteristic dark markings of the adults. All the nymphs we have seen have a light green underside, as compared to the brown underside of adults. We have seen no male nymphs, just as we have seen no male adults.