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hello flyforum,

This afternoon I found this big Tachninidae sp. in the Amsterdam Forest.
It's size was about 15 mm.
obviously are its yellow palps and the yellow boots (on the end of the legs)
on the eyes I see blondish hair

Is this Tachinidae? and what kind of Tachinidae is this?

Robert,

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pic 2

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detail of head

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Hi Robert

Good call ! It is, indeed, a Tachinid, though often mistaken for a Sarcophagidae because of the slender abdomen.
This is Phorocera assimilis, a common species in deciduous forests, typically in may. Even more common is its smaller brother, Ph. obscura.
Both Phorocera's have in the male sexe the genitalia hugely enlarged, easy to see.

Theo Zeegers

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Hi Theo,

My first impression was indeed Sarcophagidae..
Thank you for your description.

I got left one question: on what kind of insekt(butterlfy?) does it parasite?

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Hi Robert,

Have a look here http://tachinidae...brcno=7301. It seems to parasitize "Noctuidae and Geometridae living in Deciduous woodland".

I must admit to thinking it was a sarcophagid (big pulvilli and long body) but the hairy eyes and bare arista put me off so I didn't speculate on an identification Unfortunately I don't see many of them here.

Chris R.