Prag [Prague], Gottlieb Haase Söhne, 1851. Three works in one. 4to (26.1 x 20.6 cm). 143 pp. [31; 48; 64], including three title pages; six engraved plates [4; 2; 0]. Contemporary marbled boards with green paper spine cover with script title. Speckled edges.

Three works on true bugs (Hemiptera) and in particular the aquatic taxa, by the Czech entomologist Franz Xaver Fieber (1807-1872), all from the same year, which was his most productive. Containing excellent descriptions and detailed drawings - by the author - of many new or poorly known genera and species. Also published in the Actis Regiae Bohemicae Societatis Scientiarum, with J. G. Calve as publisher, but apparently these separately published copies are dated and - quite probably - published earlier. ADDED: a handwritten, signed and dated letter by Fieber, written in German with a French translation, to the French hemipterologist Victor Signoret (1816-1889), partly about the three works present here, which he donated to Signoret. In the top margin of the first title a small printed label of "Bibliothèque d'Histoire naturelle de Dr Maurice Royer". Maurice Royer (1878-1942) was a French entomologist and Hemiptera-specialist. Apparently, he acquired Signoret’s hemipterological library. Small chip to the letter, some wear to the board and spine edges, a few pages lightly spotted but generally in a very good condition. Hagen I, p. 233; Horn-Schenkling, 6561 [ Hydrocoridum], 6560 [ Corisa], and 6559 [ Rhynchotographieen].