No, not 1000 in a km square, 1000 species of insect seen in the British Isles.
A breakdown for those that are interested:
Hemiptera: 258 (227 Aphidoidea)
Square-wise not much to report, the above-mentioned chironomid joins the sciarid Tricosia coarctata, an escaped Spring Beauty and Field Wood-rush on my lifer list, the last also hosting a potential Puccinea obscurata that I'll need to double-check. Yellowhammer has finally turned up in the square having been annoyingly common just outside it and Pterocomma salicis - the black willow aphid has started hatching around the buds of Salix (easily identified as a round, dark grey aphid with orange siphunculi).
182 Honeybee - well, if Andy is happy to tick it...
183 Trichosia coarctata (lifer)
184 Pterocomma salicis
185 Cut-leaved Crane's-bill
186 Common Beefly
187 Spring Beauty (lifer)
188 Pseudorthocladius filiformis (lifer)
189 Field Wood-rush (lifer)
191 Greater Plantain
192 Ivy-leaved Speedwell