Beetle

From back in May: burying beetle Oieceoptoma thoracicum (Coleoptera: Silphidae).

Photo taken in the field below Chazey Wood, near Caversham, UK, on 2012-05-13.

Spider

From back in June: a small jumping spider, probably Marpissa muscosa (Arachnida: Araneae: Salticidae).

Photos taken in Whiteknights Park, Reading, UK, on 2012-06-17.

Muscid Fly

From back in April: a male Hydrotaea dentipes (Diptera: Muscidae).  Identification confirmed by Stephane Lebrun here at Diptera.info.

Photos taken in Whiteknights Park, Reading, UK, on 2012-04-17

Dryomyzid Flies

An orange fly from woodland: probably Dryomyza anilis = Neuroctena anilis (Diptera: Dryomyzidae).

After having been in genus Neuroctena for some time, this species has apparently now been moved back into genus Dryomyza.

I came across the following fly a few minutes later but it is probably the same species:

Photos taken in the Wildermess, Whiteknights Park, Reading, UK, on 2012-09-24

Cluster Flies

A pair of Pollenia sp (Diptera: Calliphoridae) mating.

Photos taken in the field below Chazey Wood, near Caversham, UK, on 2012-09-01.