<ref name="McCook_1882">{{cite book |first1=H. C. |last1=McCook |year=1882 |title=The honey ants of the Garden of the Gods, and the occident ants of the American plains |url=http://hymfiles.biosci.ohio-state.edu/pdfs-osuc/22409/22409.pdf |location=Philadelphia |publisher=J. B. Lippincott & Co. |pages=188 pp. |isbn=}}</ref>