100 Species #2: Fungus Gnat
Fungus gnat (probably family Sciaridae, likely Bradysia sp.)
The first insect found inside our new house is appropriately one of a type found around the world, mostly in buildings. The preferred habitat of those fungus gnat species found around humans is the potting soil of house plants. The larva is a tiny translucent maggot, easily overlooked as it burrows in the top couple inches or so. This little worm nibbles on fungi and algae in the soil, and also on the roots of the plants. Large infestations can kill the plant, and some fungus gnats are serious pests of certain kinds of agriculture. Large numbers of fungus gnats indoors indicate overwatering, and letting the soil dry out between watering will limit the gnats' numbers. Adult fungus gnats do not eat, and live for 10 days, only to breed.
This individual was alone. I caught it, photographed it, and doomed it to the outdoors.