Karl De Geer, baron, a Swedish naturalist, born at Finspang, Feb. 10, 1720, died in Stockholm, March 8, 1778. He studied at Utrecht and Upsal, was a pupil of Linnaeus, and published Memoires pour servir a vhistoire des in-sectcs (8 vols. 4to, Stockholm, 1752-78), containing descriptions of more than 1,500 species, accompanied with excellent illustrations. To this the Genera et Species Insectorum of Ret-zius (Leipsic, 1783) may be regarded as a supplement. De Geer also published several other zoological works. He inherited from an uncle a very large fortune, which he employed in benevolent and useful enterprises.