"The Leng Catalogue" was an important early North American beetle catalog...
Leng, C.W. 1920. Catalogue of the Coleoptera of America, North of Mexico. John D. Sherman, Jr., Mount Vernon, NY. x + 470 pp.
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Leng, C.W. & A.J. Mutchler. 1933. Catalogue of the Coleoptera of America, North of Mexico, Second and Third Supplements 1925 to 1932 (inclusive). John D. Sherman, Jr., Mount Vernon, NY. 112 pp.
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