1963

• Evans, H.E. 1963a. A revision of the Apenesia in the Americas (Hymenoptera, Bethylidae). Bulletin of the Museum of Comparative Zoology 163: 249–359. Reference page. 

1964

• Evans, H.E. 1964. A synopsis of the American Bethylidae (Hymenoptera, Aculeata). Bulletin of the Museum of Comparative Zoology 132(1): 1–222. BHL Reference page. 

1965

• Evans, H.E. 1965. A revision of the genus Rhabdepyris in the Americas. (Hymenoptera, Bethylidae). Bulletin of the Museum of Comparative Zoology 133(2): 67--150. Full article (BHL). Reference page. 

• Evans, H.E. 1965a. Further studies on Neotropical Epyrini (Hymenoptera, Bethylidae). Psyche 72(4): 265–278. Reference page. 

1966

• Evans, H.E. 1966a. Further studies on Neotropical Epyrini (Hymenoptera, Bethylidae). Psyche 72(4): 265–278. Reference page. 

1969

• Evans, H.E. 1969b. A revision of the genus Epyris in the Americas (Hymenoptera, Bethylidae). Transactions of the American Entomological Society 95(2): 181–352. Reference page.