Department of Entomology, National Museum of Natural History Department of Entomology, National Museum of Natural History The Department of Entomology is a research department and collection unit of the Smithsonian Institution's National Museum of Natural History (NMNH), located in Washington, DC. The department houses the U.S. National Insect Collection, one of the largest entomological collections in the world, with over 35 million specimens housed in 132,354 drawers, 33,000 jars or vials, and 23,000 slides in more than 5,200 cabinets. The department also includes research scientists and technical staff from the Smithsonian Institution, the United States Department of Agriculture Systematic Entomology Lab (SEL) and United States Department of Defense
Smithsonian Institution in early bilateral scientific exchanges with the Academy of Sciences of Cuba. The Smithsonian Institution Building ("the Castle") began construction in 1849. Designed by architect James Renwick Jr., its interiors were completed by general contractor Gilbert Cameron. The building opened in 1855. The Smithsonian's first expansion came with construction of the Arts and Industries Building in 1881. Congress had promised to build a new structure for the museum if the 1876 Philadelphia Centennial Exposition generated enough income. It did, and the building was designed by architects Adolf Cluss and Paul Schulze, based on original plans developed by Major General Montgomery