With nothing in sotck for evening perusal I did manage to add a couple of species to the square - but only from last year! At least they were both new for me.
As I approach the 500 I do notice a slight fatigue creeping in, particularly when identifying groups I don't really "care" about (yes, that exists!). I may re-jig the target groups to de-emphasise groups that I find tedious. It has to be fun, hasn't it?