Da Costa Lima A., 1959: Duas novas especies de Exurus de Bahia (Hym. Chalcidoidea, Eulophidae, Tetrastichinae). 5 pp. 

 Dalla Torre K. W. von, 1902: Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. viii + 1141 pp. Cover scratched with free back, text clear in excellent condition, pages well-bound without any free or torn ones.  Sleva 50%!

 Dalla Torre K. W., 1888: Hymenopterologische Notizen. 1 pp. 

 Dalla Torre K. W., 1889: Die europäischen Hoplocampa-Arten. 5 pp. 

 Dalla Torre K. W., 1895: Dasypoda succincta Schlett. 4 pp. 

 Dalla Torre, 1894: Tarpa oder Megalodontes 1 pp. 

 Daly H. V., 1952: Records of the palearctic Megachile rotundata in the United States (Hymenoptera: Apoidea). 2 pp. 

 Daly H. V., 1961: Biological observations on Hemihalictus lustrans, with a description of the larva (Halictidae). 8 pp. J. Kans. ent. Soc. 34: 134-141.

 Daly H. V., 1963: Close-Packed and Fibrillar Muscles of the Hymenoptera. 12 pp. 

 Daly H. V., 1966: Biological studies on Ceratina dallatorreana, an alien bee in California which reproduces by parthenogenesis (Hymenoptera: Apoidea). 17 pp. 

 Daly H. V., 1970: Clavicera Latreille, April 1802 (Insecta, Hymenoptera): proposed suppression under the plenary powers in favour of Ceratina Latreille, (October 1802 – September 1803). Z. N. (S). 1919. 2 pp. 

 Daly H. V., 1973: Lectotype designations of African bees of the genus Ceratina and allies (Hymenoptera, Apoidea). 6 pp. 

 Damianitsch R., 1866: Hymenopterologische Beitraege. 5 pp. [M47] 

 Danforth B. N., 1999: Phylogeny of the bee genus Lasioglossum (Hymenoptera: Halictidae) based on mitochondrial COI sequence data. 17 pp. Systematic Entomology 24(4): 377-393.

 Darchen R., 1954: Quelques régulations sociales dans la construction chez les Abeilles. 10 pp. 

 Darchen R., Darchen-Delage B., 1974: Physilogie des Insectes. – Nouvelles expériences concernant le déterminisme des castes chez les Mélipones (Hyménopteres apidés). 4 pp. 

 Darling D. C., 1983: A review of the New World species of Euperilampus (Hymenoptera: Chalcidoidea), with notes about host associations and phalogenetic relatioships. 40 pp. Quaestiones Entomologicae 19(1-2): 1-40.

 Darling D. C., 1986: Revision of the New World Chrysolampinae (Hymenoptera: Chalcidoidea). 28 pp. 

 Darling D. C., 1988: A review of the genus Krombeinius (Hymenoptera: Perilampidae) with a reaxamination of generic limits and phylogenetic relationships and the descriptions of two new species. 19 pp. 

 Darling D. C., 1991: Bohpa maculata, a new genus and species of Ceinae from South Africa (Hymenoptera: Chalcidoidea: Pteromalidae). 8 pp. Proc. Entomol. Soc. Wash. 93(3): 622-629.

 Darling D. C., 1992: The life history and larval morphology of Aperilampus (Hymenoptera: Chalcidoidea: Philomidinae), with a discussion of the phylogeneric affinities of the Philomidinae. 9 pp. Systematic Entomology 17(4): 331-339.

 Darling D. C., Miller T. D., 1991: Life history and larval morphology of Chrysolampus (Hymenoptera: Chalcidoidea: Chrysolampinae) in western North America. 10 pp. 

 Darling D. C., Packer L., 1988: Effectiveness of Malaise traps in collecting Hymenoptera: the influence of trap design, mesh size, and location. 10 pp. 

 Darling D. C., Smith D. R., 1985: Description and life history of a new species of Nematus (Hymenoptera: Tenthredinidae) on Robinia hispida (Fabaceae) in New York. 6 pp. Proc. Entomol. Soc. Wash. 87(1): 225-230.

 Darlington J. P. E. C., 1985: Attacks by doryline ants and termite nest defences (Hymenoptera, Formicidae, Isoptera, Termitidae). 12 pp. 

 Dartigues D., Passera L., 1979: The laying of orphan Camponotus aethiops workers (Hym., Formicidae). 8 pp. (in French). [HYM 5073]  Annales de la Societe entomologique de France (N.S.) 15(1): 109-116.

 Das B. C., Chakrabarti S., 1988: Immature stages of Kashmiria aphidis (Hymenoptera, Aphidiidae). 5 pp. [HYM903] Acta Entomologica Bohemoslovaca 85: 16-20.

 Dathe H. H., 1986: Beitraege zur Klaerung asiatischer Hylaeus-Arten der Autoren Morawitz, Cockerell und Strand (Hymenoptera, Apoidea). 17 pp. [50529] Folia Entomologica Hungarica (S.N.) 47: 23-39.

 Dathe H. H., 1994: Studien zur Systematik und Taxonomie der Gattung Hylaeus F. (Apidae, Colletinae): 1. H. annulatus (L.), eine holarktische, und H. aborigensis sp. n., eine neue sibirische Art. 5 Textfig., 5 pp. [HYM 5822] Beiträge zur Entomologie 44(2): 441-445.

 Dathe H. H., 2005: Studien zur Systematik und Taxonomie der Gattung Hylaeus F. (4) Hylaeus sinensis sp. n.- Nachweis der montan-disjunkten Verbreitung einer Artengruppe um Hylaeus niger Bridwell (Apidae, Colletinae). 5 pp. (in German). Beiträge zur Entomologie 55(2): 265-269.

 Dauber J., Wolters V., 2000: Diversität der Ameisenfauna im Landnutzungsmosaik einer peripheren Region. 4 pp. (in German). Mitt. Dtsch. Ges. Allg. Agnew. Ent. 12: 281-281.

 Daumal J., Boinel H., 1994: Qualité trophique des pontes d’Ephestia kuehniella Zell. traitées aux basses températures pour l’élevage des Trichogrammes. 11 pp. Mitt. Schweiz. entomol. Ges. 67: 373-383.

 Davis S. R., Engel M. S., 2008: A new species of Ceratosolen from the Philippines (Hymenoptera: Agaonidae). 6 pp. Genus 19(2): 307-312.

 Day M. C., 1972: A note on the species of Agenioideus Ashmead (Hymenoptera: Pompilidae) in the British List, with new synonymy. 2 pp. 

 Day M. C., 1974: A contribution to the taxonomy of the genus Anoplius Dufour (Hymenoptera: Pompilidae) including a revision of the palaeotropical subgenus Orientanoplius Haupt. 30 pp. Bulletin of the British Museum (Natural History), Entomology 30(8): 373-404.

 Day M. C., 1979: Nomenclatural studies on the British Pompilidae (Hymenoptera). 26 pp. 

 Day M. C., 1979: The affinities of Loboscelidia Westwood (Hymenoptera: Chrysididae, Loboscelidiinae). 10 pp. Systematic Entomology 4(1): 21-30.

 Dbar R. S., 1983: Ichneumonids of the genus Barthypiesta Aubert (Hymenoptera, Ichneumonidae). 7 pp. (in Russian). Entomologitsheskoe obozrenie 62(4): 773-779.

 Dbar R. S., 1984: Novyj rod i novye vidy naezdnikov triby Limneriini (Hymenoptera, Ichneumonidae) fauny SSSR i Mongolskoj narodnoj respubliki. 8 pp. [HYM 905] Nasekomye Mongolii 9: 438-445.

 De Beaumont J., Bytinski-Salz H., 1973: The Sphecidae (Hymen.) of Erez Israel III. subfamilies: Astatinae, Larrinae, Trypoxyloninae, Pemphredoninae, Crabroninae, Oxybelinae. 26 pp. Israel Journal Ent. 8: 1-26.

 De Santis L., 1968: Adiciones a la fauna Argentina de Encirtidos. II. (Hymenoptera). 6 pp. 

 De Santis L., 1985: Two new genera and species of oophilous encyrtids from Argentine (Insecta, Hymenoptera).  Spixiana 8: 259-

 De Santis, 1964: Los insektos de las Islas Juan Fernandez, Chalcidoidea II (Hymenoptera). 37 pp. 

 De-Stefani T., 1894: Descrizione di Alcune galle e catalogo dei Cinipidi. Trovati in Sicilia. 28 pp. 

 De-Stefani T., : Miscellanea Imenotterologica. 9 pp. 

 DeBach P., 1959: New species and strains of Aphytis (Hymenoptera, Eulophidae) parasitic on the California red scale, Aonidiella aurantii (Mask.), in the Orient. 9 pp. 

 Debek-Jankowska A., Barczak T., 2006: Effects of field location and cereal species on the number of grain aphid (Sitobion avenae F.) and its parasitoids (Hymenoptera parasitica). 9 pp. Journal of the Entomological Research Society 8(2): 41-49.

 Debek-Jankowska A., Barczak T., 2006: Effects of field location and cereal species on the number of grain aphid (Sitobion avenae F.) and its parasitoids (Hymenoptera parasitica). 9 pp. Journal of the Entomological Research Society 8(2): 41-49.

 DeGant F. D., 1933: Five new species of North American ichneumon-flies. 6 pp. 

 Dehalu M., Leclercq J., 1951: Application des series logarithiques de Fisher-Williams a la classification des Hymenopteres Crabroniens. 16 pp.