Solarium (myrmecology)
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Solarium_ants_myrmecology.jpg/220px-Solarium_ants_myrmecology.jpg)
A solarium is an earthen structure constructed by certain members of the Formicidae for the purpose of brood incubation. Solaria are usually dome-shaped and fashioned from a paper-thin layer of soil, connected to the main nest by way of subterranean runs.
Tapinoma erraticum is an example of a solaria-constructing species whose skill at so doing was noted by Horace Donisthorpe in the early 20th century in his book British Ants, their Life Histories and Classification.