Are snow gnats fictional

No, snow gnats are not fictional when the reference is to the wingless insects that may be seen moving around ice and snow. Another, more common way of referring to them is as snowflies (Chionea valga, Scoliocentra nigrinervis). Common examples of the ice- and snow-tolerant insect range from craneflies (Tipulidae family) to springtails (Collembola spp) and winter gnats (Trichocera hiemalis).