Citations: Anonym 1876: [Harbison, J. S.] Pacific Rural Press 11, pp. 339
Anonym 1919: [Harbison, J. S.] American bee journal, Hamilton, Ill. 59, pp. 268-270
Anonym 1927: [Harbison, J. S.] Bee and Honey 8, pp. 159-162, Portr.
Essig, E. O. 1931: A History of Entomology. New York, Macmillan Company, VI+1-1029 S., B15: 4884, pp. 647-649, Portr.
Pellett, K. L. 1929: [Harbison, J. S.] American bee journal, Hamilton, Ill. 69, pp. 556-558
Pleasants, J. E. 1921: [Harbison, J. S.] American bee journal, Hamilton, Ill. 61, pp. 7-9