SCHAEFFER (Jacob Christian): Icones insectorum circa Ratisbonam indigenorum coloribus naturam referentibus. - Naturally ausgemahlte Abbildungen Regensburgischer Insecten. Regensburg [Regensburg]: Henrich Gottfried Zunkel, [1766]. - 3 parts in one volume, in-4, dark green half-chagrin with corners, ornate spine, speckled edges (19th-century binding). First edition of the first 3 parts of this important work on entomology by German pastor and naturalist Jacob Christian Schaeffer (1718-1790), in which he studies the native insects of southern Germany, particularly the Regensburg region. The first two parts make up the complete Volume 1, and the third is the first part of Volume 2. The second part of volume 2 and the third volume, published in 1779, are missing. The illustrations include a black-style portrait-frontispiece of the author, and 150 metal-engraved insect plates based on Loibel's drawings, carefully colored at the time. There are also 3 beautiful headbands, the first two engraved on copper and the third engraved on wood but including in the center the metal-engraved arms of Catherine II. Binding skilfully refurbished, spine restored. Perfect condition inside.