Sphecodes atrescens Cockerell, 1931

Chicago citation style
Sphecodes atrescens Cockerell, 1931. 29 Aug. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhentomology_9175381&repo=DPLA. (Accessed November 19, 2018.)
APA citation style
(29 Aug) Sphecodes atrescens Cockerell, 1931. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhentomology_9175381&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhentomology_9175381&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.