[ENTOMOLOGY]. SULZER, Johann Heinrich (1735–1813). Die Kennzeichen der Insekten… Zurich: Heidegger and Co., 1761. 2 parts in one volume, 8vo. Engraved frontispiece (bound in on stub), 24 hand–colored engraved plates of over 150 insects after drawings by J. R. Schellenberg (each captioned in manuscript by a contemporary hand), engraved head–pieces. Later half–calf over marbled boards, gilt insect tools and titling in gilet fillet compartments, top edge gilt (few spots of rubbing along joints). FIRST EDITION of the author’s first work on insects and also the artist’s first major commission for an entomological book. Nissen, ZBI 4041.