Collingwood C. A., 1958: Summit Ant Swarms. 3 pp. 

 Collingwood C. A., 1963: Notes on some South European and mediterranean Ants. 6 pp. 

 Collingwood C. A., 1981: Ants (Hymenoptera: Formicidae) from Korea, 2. 6 pp. [HYM 801] Folia Entomologica Hungarica (S.N.) 42(1): 25-30.

 Collingwood C. A., 1982: Himalayan ants of the genus Lasius (Hymenoptera: Formicidae). 14 pp. Systematic Entomology 7(3): 283-296.

 Collingwood C. A., 1985: Hymenoptera: fam. Formicidae of Saudi Arabia. 73 pp. Fauna of Saudi Arabia 7: 230-302.

 Collingwood C. A., 1993: Description of the host ant of Cossyphodinus bremeri Ferrer sp. nov. (Hymenoptera, Formicidae). 4 pp. 

 Collingwood C. A., Satchell J. E., 1956: The Ants of the South Lake District. 6 pp. 

 Comba L., Comba M., 1991: Catalogo degli Apoidei Laziali (Hymenoptera: Aculeata). 169 pp. [50457] Fragmenta Entomologica 22(suppl.): 1-169. Discount 50%!

 Comba M., 1960: Contributo alla conoscenza dei Bombus Latr. e Psythyrus Lep. delle valli del Pellice, Angrogna, Germanasca (Alpi Cozie). (Hymenoptera, Apoidea). 39 pp. Fragmenta entomologica 3(8): 163-201.

 Compere H., 1925: New Chalcidoid (Hymenopterous) Parasites and hyperparasites of the black Scale, Saissetia Oleae Bernard. 33 pp. 

 Compere H., 1926: Descriptions of new Coccid-inhabiting Chalcidoid parasites (Hymenoptera). 31 pp. 

 Compere H., 1927: Notes on the Life-History of two orienal Chalcidoid Parasites of Chrysomphalus. 11 pp. 

 Compere H., 1928: New Coccid-inhabiting chalcidoid parasites from Africa and California. 19 pp. 

 Compere H., 1931: New Encyrtid (Hymenopterous) Parasites of a Pseudococcus species from Eritrea. 12 pp. 

 Compere H., 1931: Revision of the genus Diversinervus Silvestri. Parasites of Saissetia oleae. African species of Baeoanusia. 30 pp. 

 Compere H., 1936: Notes on the classification of the Aphelinidae with descriptions of new species. 47 pp. 

 Compere H., 1947: A report on a collection of Encyrtidae with descriptions of new genera and species. 23 pp. 

 Compere H., 1955: A systematic study of the genus Aphytis Howard (Hymenoptera, Aphelinidae) with descriptions of new species. 49 pp. 

 Conde O., 1932: Eine neue Selandriinen- und Hoplocampinen- Gattung aus Lettland. (Hym. Tenthr.). 7 pp. 

 Conde O., 1935: Oryssoidea et Tenthredinoidea collecta in Ussuri et Sachalin ab N. Delle. 21 pp. 

 Constantineanu I., Constantineanu R., Lungu-Constantineanu C. s, 2000: New ichneumonid species (Hymenoptera, Ichneumonidae) for the Romanian fauna. 2 pp. 

 Constantineanu I., Constantineanu R., Lungu-Constantineanu C. S., 2001: On the presence of Neurateles papyraceus Ratzeburg (Hymenoptera: Ichneumonidae, Orthocentrinae) in the Ramanian fauna. 3 pp. 

 Constantineanu M. J., 1961: Eine neue Art von Schlupfwespen aus Rumänien. Familie Ichneumonidae Haliday, 1838, Unterfamilie Ichneumoninae Ashmead, 1894, Tribus Ichneumonina Cyclopneusticae Berthoumien, 1894. 3 pp. 

 Constantineanu R., Constantineanu I., 1997: Contributions to the knowledge of Ichneumonids (Hymneoptera, Ichneumonidae) from Macin mountains (II). 9 pp. 

 Constantineanu R., Constantineanu I., 1997: Ichneumonide (Hymenoptera, Ichneumonidae) din parcurile nationale Retezat si Valea Cernci. 59 pp. 

 Constantinescu A., 1976: Ord. Hymenoptera, Apoidea (Fam. Colletidae, Halictidae, Melittidae, Magachilidae et Apidae) in l’entomofaune du nord de la Dobrogea, la zone Macin – Tulcea – Niculitel. 5 pp. 

 Conway J. R., 1996: A field study of the nesting ecology of the thatching ant, Formica obscuripes Forel, at high altitude in Colorado. 7 pp. 

 Cooper K. W., 1985: Recognition of the female of Tracheliodes foveolineatus (Viereck), with description of the male and larva (Hymenoptera: Sphecidae: Crabroninae). 8 pp. Proc. Entomol. Soc. Wash. 87(2): 467-474.

 Cooper K. W., 1993: Description of Osmia cahuilla n. sp., recognition of the male of O. gabrielis Sandhouse and the likely female of O. bridwelli Sandhouse (Apoidea, Megachilidae). 9 pp. 

 Cooper M., 1993: Two new species of Polybia (Hym., Vespidae) with notes on other members of the genus. 8 pp. 

 Cooper M., 1996: The male of Pseudacarmenes alfkeni johnsoni (Cameron) (Hym., Vespidae, Eumeninae). 2 pp. 

 Cooper M., 1997: The subgenus Megacanthopus Ducke of Mischocyttarus de Saussure (Hym., Vespidae) with a key and three new species. 7 pp. 

 Cooper M., 1998: Two new species of Mischocyttarus (Hym., Vespidae) with notes on some members of the Iheringi group. 5 pp. 

 Cooper M., 1999: A new species of Zethus F. (Hym., Vespidae, Eumeninae) with unusual male genitalia. 4 pp. 

 Cooper M., 2000: A new species of Parachartergus R. von Ihering (Hym., Vespidae, Polistinae) with a key to the members of the Fulgidipennis group and notes. 6 pp. 

 Cooper M., 2000: Five new species of Agelaia Lepeletier (Hym., Vespidae, Polistinae) with a key to members of the genus, new synonymy and notes. 22 pp. 

 Cooper M., 2001: A new species of Cuyodynerus Willink (Hym., Vespidae, Eumeninae) from Bolivia. 2 pp. 

 Cooper M., 2001: Two new species of Agelaia Lepeletier (Hym., Vespidae, Polistinae). 4 pp. 

 Cooper M., 2002: A new species of Epipona (Hym., Vespidae, Polistinae) with a key to the members of the genus. 6 pp. 

 Copland M. J. W., King P. E., 1972: The structure of the female reproductive system in the Torymidae (Hymenoptera: Chalcidoidea). 22 pp. 

 Corbet S. A., Rotheram S., 1965: The life history of the ichneumonid Nemeritis (Devorgilla) canescens (Gravenhorst) as a parasite of the mediterranean flour moth, Ephestia (Anagasta) kuehniella Zeller, under laboratory conditions. 6 pp. 

 Cortopassi-Laurino M., Nogueira-Neto P., 2003: Notes on the bionomy of the stingless bee Tetragonisca weyrauchi Schwarz, 1943 (Apidae, Meliponini). 8 pp. Acta Amazonica 33(4): 643-650.

 Coruh S., 2016: Biogeography and host evaluation of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) in Turkey. 28 pp. Journal of the Entomological Research Society 18(2): 33-60.

 Coruh S., Kolarov, J., 2012: Description of the male of Ophion internigrans Kokujev, 1906 (Hymenoptera: Ichneumonidae: Ophioninae) with a key to the Turkish Ophion Fabricius, 1798, Species. 6 pp. (in English). Journal of the Entomological Research Society 14(2): 55-60.

 Coruh S., Özbek H., Kolarov J., 2002: New and rare taxa of Ichneumonidae (Hymenoptera) from Turkey. 4 pp. 

 Coruh S., Özbek H., Kolarov J., 2005: A Contribution to the knowledge of Ichneumonidae (Hymenoptera) from Turkey. 5 pp. [HYM 7298] (in English). Journal of the Entomological Research Society 7(3): 53-57.

 Coruh S., Özbek H., Kolarov J., 2005: A Contribution to the knowledge of Ichneumonidae (Hymenoptera) from Turkey. 5 pp. [HYM 7298] (in English). Journal of the Entomological Research Society 7(3): 53-57.

 Costa A., 1866: Sulle specie d’Imenotteri del genere Megischus. 2 pp. 

 Cotti G., 1963: Bibliografia ragionata 1930-1961 del gruppo Formica rufa in italiano, deutsch, english. 413 pp.  Discount 20%!

 Couchman J. R., 1977: A collection of aphid parasites and hyperparasites (Hym.) from Iceland. 4 pp.