It was on the third day of the diatoms that Hapley became aware of a novel addition to the local fauna. He was working late at the microscope, and the only light in the room was the brilliant little lamp with the special form of green shade. Like all experienced microscopists, he kept both eyes open. It is the only way to avoid excessive fatigue. One eye was over the instrument, and bright and distinct before that was the circular field of the microscope, across which a brown diatom was slowly moving. With the other eye Hapley saw, as it were, without seeing. He was only dimly conscious of the brass side of the instrument, the illuminated part of the table-cloth, a sheet of notepaper, the foot of the lamp, and the darkened room beyond.
Suddenly his attention drifted from one eye to the other. The table-cloth was of the material called tapestry by shopmen, and rather brightly coloured. The pattern was in gold, with a small amount of crimson and pale blue upon a grayish ground. At one point the pattern seemed displaced, and there was a vibrating movement of the colours at this point.
Hapley suddenly moved his head back and looked with both eyes. His mouth fell open with astonishment.
It was a large moth or butterfly; its wings spread in butterfly fashion!
It was strange it should be in the room at all, for the windows were closed. Strange that it should not have attracted his attention when fluttering to its present position. Strange that it should match the tablecloth. Stranger far that to him, Hapley, the great entomologist, it was altogether unknown. There was no delusion. It was crawling slowly towards the foot of the lamp.
'New Genus, by heavens! And in England!' said Hapley, staring.
