Parapoynx stagnalis (Zeller, 1852)
Rice Caseworm
(one synonym is Hydrocampa depunctalis Guenée, 1854)
ACENTROPINAE ,   CRAMBIDAE ,   PYRALOIDEA
 
Don Herbison-Evans,
(donherbisonevans@outlook.com)
and
Stella Crossley


drawing by Harold Maxwell-Lefroy, listed as Nymphula depunctalis
,
Indian Insect Life: a Manual of the Insects of the Plains, 1909, Plate XLIX, fig. 1,
image courtesy of Biodiversity Heritage Library, digitized by NCSU Libraries.

This Caterpillar is an international pest on:

  • Rice ( Oryza sativa, POACEAE ).

    The caterpillar is green with a yellow head and prothorax, and has sparse stiff hairs.


    drawing by Harold Maxwell-Lefroy, listed as Nymphula depunctalis
    ,
    Indian Insect Life: a Manual of the Insects of the Plains, 1909, Plate XLIX, fig. 5,
    image courtesy of Biodiversity Heritage Library, digitized by NCSU Libraries.

    The caterpillar lives in a case made from a rolled-up rice leaf.


    drawing by Harold Maxwell-Lefroy, listed as Nymphula depunctalis
    ,
    Indian Insect Life: a Manual of the Insects of the Plains, 1909, Plate XLIX, fig. 3,
    image courtesy of Biodiversity Heritage Library, digitized by NCSU Libraries.

    The caterpillar pupates in its case.


    (Specimen: courtesy of The Australian Museum)

    The adult moths have semi-transparent wings, with faint brown zig-zag lines across them. Each fore wing has two black comma-shaped marks, one double and one single. The moths have a wingspan of about 2 cms.


    (Photo: courtesy of Buck Richardson, Kuranda, Queensland)

    The species is found around the world in the southern tropics, including:

  • Andaman Islands,
  • Argentina,
  • Hong Kong,
  • India,
  • Philippines,
  • Thailand,

    and in Australia in:

  • Northern Territory,
  • Queensland, and
  • New South Wales.


    Further reading :

    Achille Guenée,
    Deltoïdes et Pyralites,
    in Boisduval & Guenée:
    Histoire Naturelle des Insectes; Spécies Général des Lépidoptères,
    Volume 9, Part 8 (1854), p. 276, No. 269.

    Peter Hendry,
    The Night of the Crambidae,
    Butterfly and Other Invertebrates Club Newslettter,
    Issue 49 (June 2008), pp. 26-29.

    Philipp C. Zeller,
    Lepidoptera Microptera quae J.A. Wahlberg in Caffrorum terra collegit,
    Stockholm : Norstedt (1852).


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    (updated 5 February 2010, 24 March 2017)