A Pseudargyrotoza conwagana (Lepidoptera: Tortricidae), one of several dozen that I saw swarming on the leaves of ash and horse chestnut trees alongside the path on my walk on Saturday.
Photo taken in Chazey Wood, near Caversham, UK on 2015-06-06.
A Conops vesicularis (Diptera: Conopidae). The larvae are parasites of bees while the adults, judging from their yellow-brown colour, are hornet mimics.
Specimen taken at Balmer Lawn, Brockenhurst, UK, on 2015-05-16.