Do you know what it is?

[Bootstrap Bob]

Whatever you call them they're vicious!

I can vouch for that. About 8 years ago I was bitten on the bridge of my nose by one, not sure how but it was nasty and for a week I looked like a Clingon (Startrek before anyone says anything )
It was very painful and I will kill on site if I see another!

 

[Staghound]

Here's my shot of the whole critter

In its last few seconds of life

 

[scrubcutter]

A female Haematopota pluvialis.