Primary references

• Kirby, W. 1837. The insects. In: Richardson J. (Ed.), Fauna boreali-Americana; or the zoology of the northern parts of British America: containing descriptions of the objects of natural history collected on the late northern land expeditions, under command of Captain Sir John Franklin, RN. Part 4. J. Fletcher, Norwich; 325 + [2] pp., 8 pls. BHL Reference page. 
• Casey, T.L. 1899. A revision of the American Coccinellidae; with Appendix of Coccinellidae taken in equatorial and southern Africa during the Transit of Venus expedition to the Cape of Good Hope in 1882. Journal of the New York Entomological Society 7(2): 71–169. BHL Reference page.