Both adult and immature Ephemeroptera are strongly represented in the collection, largely due to the interests of Professor J. G. Needham whose activities at Cornell University spanned three decades (1906-1936). There are 15 drawers of pinned ephemeropterans, but the vast quantity of material is stored in vials of alcohol. Our "wet" collections include more than 8000 vials of Ephemeroptera, mostly determined material. There are 3726 microscope slide mounts of ephemeropterans, including slide mounts of whole nymphs, nymph structures (e.g., gills), adult wings, genitalia, etc. The holdings of this order are worldwide and include 206 primary types and 314 secondary types (Search Types). Prof. Barbara Peckarsky teaches aquatic ecology in our department, and maintains a separate teaching collection of local freshwater invertebrates.
