I was preparing dinner the other night and noticed tenanted mines on the sugarsnap peas I was about to cook!
They were purchased from Tesco, Princes Risborough (Bucks, VC24) and originate from the USA.
They are tenanted, and appear to be a Liriomyza species. Following a post on the UK leafminers which seemed to confirm my initial diagnosis of genus. As this is a potential notifiable pest species (and I wanted to find out what it was!), I sent the bag of peas to FERA, and Chris Malumphy has...
Saw quite a few of these striking flies around reedy ponds in East Sussex on 20th Aug 2014. Pretty sure I also have a specimen of the same from the pools at Moccas Park but haven't even worked out what family it belongs to yet. Admittedly I haven't tried but can someone spare me the effort by recognising it straight off? Thanks!
Edit: Dave Gibbs tells me it's an easy one - Sepedon sphegea (Sciomyzidae).