In 1867, Professor Albert J. Cook started the ARC and it currently houses ~ 1.5 million specimens mounted on pins, slides or stored in alcohol representing ~35,000 species. A significant portion of the collection represents the insect diversity Michigan and the Great Lakes Region. Other significant collections represent the world-wide arthropod fauna for select taxa, e.g., Lepidoptera and Scolytinae. Researchers in systematics, agriculture, natural resources, urban insect management, to extension personnel and to the general public use these specimens. Please direct inquiries to Anthony Cognato, Director or Gary Parsons, Manager (parsonsg@cns.msu.edu).