The field notes document the work of Richard D. Sage in Costa Rica, Mexico, and United States, July 7 - September 7, 1965. The field notes are divided into two sections: journal and species seen. The journal documents work in Costa Rica. Pages are numbered. Entries are dated and begin with location (usually landmark, town, province, country), elevation and describe field work completed, specimens collected, flora and fauna observed. Most descriptions focus on bees and related plants. Entries contain detailed descriptions of appearance, quantity and behavior of bees, their nests, sometimes listed with time of day. Includes sketches and hand drawn maps with notes on observed behavior and location and type of plants. There are also detailed descriptions of flowering plants, sometimes with specimen number. |In section listed "species seen," entries begin with locality, date, and list observed fauna with quantity and their common or scientific name. These include at least birds, reptiles, and mammals. At the end of the field notes is a list of pictures taken, which describe images per film roll, with captions. Captions detail location, elevation, and description. There is also an expedition outfit list from a University of California Museum of Vertebrate Zoology 1947 Expedition and map of Mexico.|Locations are in (but limited to) Guanacaste and San Jose in Costa Rica; California and Texas in United States; Oavaca and Sonora in Mexico.