Some more stacking … 1

Some more stacking ...
Here are a few Pelecotheca (Cryptocladocera) sp. stacks. The technique involves taking about 30 photos, each at a different focal point in the specimen and using a macro-rail to slowly move the camera backwards or forwards. The focused parts of each photo are then combined using software called Zerene Stacker (Pmax setting) to make the ...

Atactosturmia ??? (Surinam)

Atactosturmia ??? (Surinam)
Yet another fly that keys to Atactosturmia … would be nice one day to know which of them really are Atactosturmia 😉

Icelia (Ervia?) sp. (Surinam)

Icelia (Ervia?) sp. (Surinam)
An interesting species that superficially looked similar to the Uramya from the same batch but this has bare eyes. EDIT (26/11/2010): Monty Wood says that this looks correct as Icelia but that Ervia is a close sister genus – possibly even the same thing when all is said and done.

Various interesting Polideini (Surinam)

Various interesting Polideini (Surinam)
The Polideini is becoming one of my favourite tribes because they have such unusual features. Most tachinids have a disc-like, hairy lappet covering the metathoracic spiracle (the hind one on the thorax) but the Polideini all have paired hairy lappets that don’t quite meet at the top, leaving a little hole. They also have a ...

close to Spathidexia (Gymnopalpus) setipennis (Surinam)

close to Spathidexia (Gymnopalpus) setipennis (Surinam)
This one keys quite confidently to Uramya sp. but it is a female so it lacks any tails that might confirm the determination. EDIT (26/11/2010): Monty has said that this is incorrect – it looks closer to Spathidexia and is possibly Spathidexia (Gymnopalpus) setipennis.

Pseudosiphona sp. (Surinam)

Pseudosiphona sp. (Surinam)
Pseudosiphona is a very common genus in the neotropics – in these photos you can see the small labellum (much shorter than in Siphona) and the katepisternal bristle arrangement (with the strong lower bristle close to the posteroventral edge) typical of this genus.

Acaulona or Xanthomelanopsis ??? (French Guiana & Surinam)

Acaulona or Xanthomelanopsis ??? (French Guiana & Surinam)
Acaulona & Xanthomelanopsis look very similar to Pennapoda spp. but without the leaf-like antero-dorsal bristles on the hind tibia. The only difficulty with these flies is that I just can’t make up my mind whether they have enough dorsocentrals to qualify as Xanthomelanopsis.

Copecrypta sp. (Surinam)

Copecrypta sp. (Surinam)
This is the first of a batch of flies sent to me by Menno Reemer and caught by him in Surinam in 2006. Copecrypta (and the allied genera Deopalpus & Itacuphocera) are some of my favourites. They all have an interesting ant- or beetle-shaped abdomen.