Driving from Hudson to Como on the 23rd of Septemberm, 1892, about 8 p.m. the night being warm and damp, I was much surprised to see on the hard road something luminous, emitting quite as strong a light as the glow-worm in England. We stopped quickly, but before I could get back the few yards it had disappeared. Some half mile further we passed another, which also, before I could get to it, disappeared. Can any of your readers say what these were? Their sudden disappearance and our failing to find them, though we struck a mathc in both cases, would lead me to think they were some sort of earth worm, as these draw themselves quickly into their holes when disturbed. How else is their sudden disappearance to be accounted for?