According to Monthly Notices, 30-135, Lieut. Herschel of Bangalore, India, reported that, for two days (Oct. 17 and 18, 1870), dark bodies passed across the sun in a continuous stream, “varying in size and velocity.” The lieutenant explains, “As it was, the continuous flight, for two whole days, in such numbers, in the upper regions of the air, of beasts that left no stragglers, is a wonder of natural history, if not of astronomy.” When focusing, he saw “either wings or phantom-like appendages.” As he watched, one of them paused, hovered, then whisked off. The lieutenant decided, “There was no longer doubt: they were locusts or flies of some sort.”
Fort notes that “If locusts fly high, they freeze and fall in thousands,” as noted in Nature, 47-581.
–Charles Fort, The Book of the Damned, pp222-223 (The Complete Books of Charles Fort, Dover, c1974).