---

Hi Folks,
I am trying to update the diptera part of my website, starting with the basal brachycerans, however the whole thing is 15 years out of date and so any data will be used eventually.

I am using Fauna Europea for numbers in Europe, and so i have these.

Right now I am looking for data on the known or suspected number of species world wide for any family really, whatever your expertise is please contribute, but particularly.

Rhagionidae
Xylomyidae
Xylophagidae

I am also interested in advice on
1)Robber Flies vs 2)Robber-flies
I was taught that real flies had their common names hyphenated, but then you have a problem with Long-legged Flies or Small-headed Flies.
A double hyphenation would not work, but then should all fly names be completely separated as in 1 above.

All opinions gladly accepted

Gordon