- Friese, H. 1916
- [1917?] Zur Bienenfauna von Costa Rica. Stettiner Entomologische Zeitung, 77: 287-350
- Cresson, E.T. 1878
- [1879?] Descriptions of new North American Hymenoptera in the collection of the American Entomological Society. Transactions of the American Entomological Society 7: 61–136.
- Schmiedeknecht, O. 1882
- 1884. Apidae Europaeae (Die Bienen Europas) per genera, species et varietates dispositae atque descriptae. Tomus I. Nomada, Bombus, Psithyrus et Andrena. Gumperda & Berlin, Berlin.
- Frey-Gessner, E. 1899
- 1907. Hymenoptera - Apidae. Gesellig lebende Bienen, Urbienen und Schenkelsammler. . Fauna insectorum helvetiae, pp. 1-392.
- Novitates 3808
- 1–20. https://doi.org/10.1206/3808.1