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The Society for the study of flies (Diptera)

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#1 2018-01-07 19:22:04

marilynabdulla
Registered user
Name: Marilyn Abdulla
From: Felixstowe, Suffolk
Registered: 2018-01-07
Posts: 2

Moth trap intruders

I ran my moth trap on 30th December 2017, but only managed to capture these 2 flies.  I have keyed them out to Ceratinostoma ostiorum, does this look likely?  I live in Old Felixstowe, within about 1km of the beach. TM316370.  Thanks.


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#2 2018-01-08 15:25:23

Tony Irwin
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Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 663

Re: Moth trap intruders

I'd say this was a pair of Fucellia (Anthomyiidae). Ceratinostoma has a different thoracic pattern, and more uniformly coloured, more bristly legs.

Last edited by Tony Irwin (2018-01-08 15:29:53)

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#3 2018-01-08 18:27:47

marilynabdulla
Registered user
Name: Marilyn Abdulla
From: Felixstowe, Suffolk
Registered: 2018-01-07
Posts: 2

Re: Moth trap intruders

Thanks Tony, I will try the key again.

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#4 2018-01-08 19:22:57

Tony Irwin
DF Members
Name: Tony Irwin
From: Norwich
Registered: 2008-03-01
Posts: 663

Re: Moth trap intruders

If you have the specimens, have a look for the anthomyiid characters of (i) some pale erect hairs underneath the scutellum and (ii) crossed bristles on the frons (at least in the female). Not all anthomyiids have these characters, but most do, and if they're present, then you can discount Scathophagidae.

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