- The Valley of the Second Sons: Letters of Theodore Dru Alison Cockerell, a Young English Naturalist, Writing to His Sweetheart and Her Brother About His Life in West Cliff, Wet
- Fossil Hymenoptera From Florissant, Colorado (Classic Reprint)
- Bees from Central America, Principally Honduras: Smithsonian Institution, V98, No. 3233
- African Hylaeine Bees: American Museum Novitates, No. 847
- Halictine Bees from Morocco