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Hi, I'm not sure about the identification of this tachinid. Wing cell r4+5 seems to be open.

location: Bragança, Portugal
date: 25/07/2018

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Arista

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Occiput

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Humeral callus

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Wing

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Mid-dorsal depression of syntergite 1+2

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Yes, well spotted.
It is a female, which is pretty awkward.
It keys out to E. micronyx, which is an extremely rare species.
Did you collect it ?
From what altitiude is the record ?


Thanks

Theo

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Thanks, Theo. The specimen was collected and the altitude is 1054 m.

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Nice. If you want to be sure, you are welcome to send the specimen over.
You know my address (or send me a PM)


Thanks


Theo

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Thank you, Theo. I'll keep the specimen for you.

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So, this proved to be interesting.

As already observed, there are too many black hairs on occiput for apenninus.
That said, there are too few in comparison with my only micronyx in collection. Moreover, the greyish dusting on tergites is too prominent for micronyx.

On the humeri, on one side there are 5 bristles, on the other side 4. This explains the confusion: clearly this must be an aberration. We are dealing wit a female of Eriothrix argyreatus with only 4 humeral bristles on one side .

So: Eriothrix argyreatus .

Thanks for sending the specimen, in these aberrant cases one really needs to have the specimen at hand to see what is going on !


Theo

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Thank you Theo for the identification and explanation! I'm really happy to have found an interesting Eriothrix. :)