---

Found on a heap of Honey Fungus (Armillaria) on a stump in my nearby public park on 2 Nov 2014, Ipswich, East Suffolk (TM163450). I think it is a male Crumomyia roserii. Any comment, and especially confirmation of the species, would be very much appreciated.

Best wishes,
Martin

Here is the place I found the fly

---

lateral view

---

Looking at Brian Pitkin's key to British Sphaerocerids for important characters, here is a close-up of the wing, which suggests Copromyzinae.

---

... and the marginal scutellar setae are also indicative of Copromyzinae...

---

I think this fly has more than a single row of postoculars...

---

...

---

... and after much searching I found the hook on 1st front tarsomere characteristic of Crumomyia!

---

I don't think the hind tibia have distinct av setae about the middle...

---

the anepisternum is mostly shining and the katepisternum without close-set long setae

---

I couldn't find a hook on hind first tarsomere resembling the illustration in the key...

---

another view of the hind legs, still no hook-like process...

---

tibiae yellow brown (especially mid and hind tibiae - see hind legs photos and lateral and ventral views above), anepimeron dusted and, as previously illustrated, no hook on male hind 1st tarsomere -> Crumomyia roserii.

Comments, please...

---

Paul,
If you have a minute... please... or would you be able to look at the fly if I popped it in the post?
Best wishes,
Martin

---

This is indeed Crumomyia roserii. |t

---

Thanks Paul. I'll submit a photo to the gallery.