grant burleigh's picture

Fungus gnat or sawfly?

Observed: 31st July 2010 By: grant burleighgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebratesgrant burleigh’s reputation in Invertebrates
P0740
P0741
Description:

Continuing the discussion with Colin007 regarding his post Fungus Gnat: It's somewhat marginal, but the insect here does not appear to have a black band on its abdomen - which in this particular case, would go in favour of Arge pagana. Something I must look out for if the insect turns up again.

Identifications
Species interactions

No interactions present.

Comments

grant burleigh's picture

Fungus gnat or sawfly

Are the antennae not a bit long for Beris vallata? Wikipedia shows Sciara analis having a completely yellow abdomen. Is that a British species?

jonmortin's picture

Sciara species

I have seen several images of Sciara species which look very like your specimen, including the black and yellow abdominal markings. Sciara hemerobioides (syn.=thomae) seems a particularly good match.

Martin Harvey's picture

Sciara hemerobioides

Sciara hemerobioides does seem a distinct possibility, I'm just not aware of any way of being certain - there have been lots of additions to the British list for Sciaridae in recent years and not much published on how to identify them, as far as I know.

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Entomologist and biological recorder