Walsh, B. D. 1863 ("1862"). On the genera of Aphidae found in the United States. Proceedings of the Entomological Society of Philadelphia 1:294-311. PDF

Notes: Publication date from F. M. Brown (1964:307).

Cresson, E. T. Sr. 1865a. Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory. [part]. Proceedings of the Entomological Society of Philadelphia 4:242-313. PDF

Notes: Publication date from information supplied in F. M. Brown (1964:307).

Cresson, E. T. Sr. 1865b. Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory. [concl.]. Proceedings of the Entomological Society of Philadelphia 4:426-488. PDF

Notes: Publication date from information supplied in F. M. Brown (1964:307). Ants pp. 426-428.

Buckley, S. B. 1866. Descriptions of new species of North American Formicidae. Proceedings of the Entomological Society of Philadelphia 6:152-172. PDF

Notes: Pagebase date is July 1866. Possibly published later, at least as a whole issue. See F. M. Brown (1964).

Buckley, S. B. 1867. Descriptions of new species of North American Formicidae (continued from page 172.). Proceedings of the Entomological Society of Philadelphia 6:335-350. PDF

Notes: Pagebase date is February 1867. For discussion of problems with dating the parts of this serial see F. M. Brown (1964).