Flying ants, male & female, usually swarm, & migrate on hot sunny days in August & Septembr; but this day a vast emigration took place in my garden & myriads came forth in appearance, from the drain which goes under the fruit-wall; filling the air & adjoining trees & shrubs with their numbers. The females were full of eggs. This late swarming is probably owing to the backward, wet season. The day following, not one flying ant was to be seen. The males, it is supposed all perish: the females wander away; & such as escape the Hirundines get into the grass, & under stones, & tiles, & lay the foundation of future colonies.
Posted by sydney on Oct 2nd, 1792