The Field Museum's Collection of Insects houses worldwide collections of Arthropoda (excluding Crustacea) that rank fifth in overall size among North American collections. At present, the collection includes approximately 4.1 million pinned insects and 8 million specimens or lots of insects and other arthropods in alcohol or on microscope slides. The collection receives heavy use by US and international visitors and borrowers. Collection data are now available online in KE EMu for many parts of the collection.