1878 Two parts in two. 16 p. [= pp. 41-48, 49-56], 8 plates [= 26, 28-29, 31-35], roy. 4to (ca. 32.0 x 25 cm), original uniform printed wrappers.One of the finest hymenopterological works with stunningly beautiful illustrations, however only two parts of a work that was published in nine parts (of a projected 24) with 45 plates. These are the parts 6 and 7, the first with three of five plates, the latter complete. Text in two columns, English and Dutch. Wrappers chipped and loose, otherwise good. Rare. Nissen ZBI, 4287
1861 2 vols (complete). 558 p, num. figs, 35 lithographed pls, contemporary hcloth. Some slight scattered foxing, small waterstain in upper left corner of last few plates.
1863 3, 60 p. 4 beautiful handcoloured plts, 4to, paperbound (original printed covers ). Spine worn, partly loose.
1863 The Hague, Martinus Nijhoff, 1863 : In-4 Carré, Broché. 60 pp., 2 ff. n. ch. (table alphabétique des espèces, explication des planches), 4 planches en couleurs hors-texte, dérelié, de toute rareté ! Bon état, Couv. convenable, Dos satisfaisant, Quelques rousseurs.
1870 457 p., 251 figs, frontispiece, contemporary hcalf (somewhat rubbed).
1878 32 p., 2 (1 partly col.) pls, disbound (no covers). Published in: Tijdschrift voor Entomologie.
1870 457 p., 251 figs, frontispiece, publisher’s green cloth (spine gilt). Rebacked copy.