Pech P., 2014: Faunistic records from the Czech Republic – 364. Hymenoptera: Formicidae. 1 pp. Klapalekiana 50(1-2): 129.

 Pech P., Dvořáčková M., 2015: Faunistic records from the Czech Republic – 382. Hymenoptera: Formicidae. 1 pp. Klapalekiana 51(3-4): 168.

 Pech P., Werner P., 2008: Faunistic records from the Czech Republic – 250. Hymenoptera: Formicidae. 1 pp. Klapalekiana 44: 74.

 Peck O., 1969: Chalcidoid (Hymenoptera) parasites of the alfalfa leaf-cutter bee, Megachile rotundata, in Canada. 6 pp. 

 Peck O., 1974: Chalcidoid (Hymenoptera) parasites of the horn fly, Haematobia irritans (Diptera: Muscidae), in Alberta and Elsewhere in Canada. 5 pp. 

 Peck O., 1974: Nearctic records of two European species of Pteromalidae (Hymenoptera: Chalcidoidea). 3 pp. 

 Peck O., 1974: Steffanolampus, a new genus for Perilampus salicetum (Chalcidoidea) and its nearctic distribution. 4 pp. 

 Peckham D. J., Kurczewski F. E., Peckham D. B., 1973: Nesting behavior of nearctic species of Oxybelus (Hymenoptera: Sphecidae). 15 pp. 

 Pečírka J., 1906: Myrmecophilien bei Formica rufa L. 8 pp. [HYM 3030] Acta Societatis entomologicae Cechosloveniae 3: 1-8.

 Pedata P. A., Polaszek A., 2003: A revision of the Encarsia longifasciata species group (Hymenoptera: Aphelinidae). 14 pp. Systematic Entomology 28(3): 361-374.

 Peeters C., Hölldobler B., 1992: Notes on the morphology of the sticky “Doorknobs” of larvae in an Australian Hypoponera sp. (Formicidae; Ponerinae). 8 pp. 

 Pekel S., Kolarov J., Özbek H., 2000: New records of the subfamily Banchinae (Hymenoptera, Ichneumonidae) from Turkey. 4 pp. 

 Peleg B. A., 1988: Effect of a new phenoxy juvenile hormone analog on California red scale (Homoptera: Diaspididae), Florida wax scale (Homoptera: Coccidae) and the ectoparasite Aphytis holoxanthus DeBache (Hymenoptera: Aphelinidae). 5 pp. 

 Pellmyr O., Groth I., Bergström G., 1983: Comparative analysis of the floral odors of Actaea spicata and A. erythrocarpa (Ranunculaceae). 4 pp. 

 Penati F., Olmi M., 2011: Catalogue of Dryinidae, Embolemidae and Sclerogibbidae of the Museo Civico di Storia Naturale “Giacomo Doria” (Hymenoptera, Chrysidoidea). 21 pp. Annali del Museo Civico di Storia Naturale “Giacomo Doria” 103: 71-92.

 Pennacchio F., Digilio M. C., Tremblay E., Tranfaglia A., 1994: Host recognition and acceptance behaviour in two aphid parasitoid species: Aphidius ervi and Aphidius microlophii (Hymenoptera: Braconidae). 8 pp. 

 Pennacchio F., Vinson S. B., Tremblay E., 1991: Effects of Cardiochiles nigriceps Viereck (Hymenoptera, Braconidae) teratocytes on physiology of its host Heliothis virescens (F.) (Lepidoptera, Noctuidae). 6 pp. 

 Penteado-Dias A. M., 1996: Nova espécies de Acampsis Wesmael (Hymenoptera, Braconidae, Sigalphinae) do Brasil. 3 pp. Revta bras. Zool. 13(2): 331-333.

 Penteado-Dias A. M., Achterberg C. van, 2002: First record of the genus Probethylus Ashmead (Sclerogibbidae: Probethylinae) from Brazil, with description of a new species. 3 pp. 

 Penteado-Dias A. M., Achterberg C. van, 2004: A new species of Allobracon Gahan (Braconidae: Hormiinae) from Brazil, and the first record of green Hormiinae. 8 pp. 

 Penteado-Dias A. M., Figueiredo M. L. C., Dias M. M., Osório T. C., Cruz I., 2006: First host records for Exasticolus fuscicornis (Cameron, 1887) (Hymenoptera: Braconidae: Homolobinae). 3 pp. Zoologische Mededelingen Leiden 80(1): 109-112.

 Penteado-Dias A. M., Nascimento A. R., Dias M. M., 2008: The description of the male and the first host data of Pseudophanerotoma (Pseudophanerotoma) alvarengai Zettel, 1990 (Hymenoptera: Braconidae: Cheloninae). 5 pp. Zoologische Mededelingen 82: 401-405.

 Penteado-Dias A. M., Shimabukuro P. H. F., Achterberg C. van, 2002: A new species of the genus Xanthomicrogaster Cameron (Hymenoptera: Braconidae: Microgastrinae) from Brazil. 4 pp. 

 Perepechayenko V. L., 2000: Review of braconid wasps of the genus Trachionus (Hymenoptera, Braconidae, Alysiinae) of Palaearctic. (in Russian). 10 pp. Vestnik zoologii 34(3): 29-38.

 Perepechayenko V. L., 2007: Pereopisanie Chorebus griffithsi Zaykov, 1984 (Hymenoptera, Braconidae, Alysiinae). [A redescription of the Chorebus griffithsi Zaykov, 1984 (Hymenoptera, Braconidae, Alysiinae).] 3 pp. Caucasian entomological bulletin 3(2): 247-249.

 Perepechayenko V. L., 2008: An annotated list of the braconid wasps of the tribe Dacnusini (Hymenoptera. Braconidae: Alysiinae) of Ukraine. II. Genera with haired eyes and genera wiht 4-toothed mandibles. 18 pp. Caucasian Entomological Bulletin 4(3): 363-380.

 Perepechayenko V. L., 2008: Chorebus stolyarovi sp. n. (Hymenoptera: Braconidae: Alysiinae: Dacnusini) from Ukraine and Russia. 5 pp. Caucasian entomological bulletin 4(2): 243-247.

 Perepechayenko V. L., 2009: Chorebus medvedevi sp. n. (Hymenoptera: Braconidae: Alysiinae: Dacnusini) iz Turkmenii. [Chorebus medvedevi sp. n. (Hymenoptera: Braconidae: Alysiinae: Dacnusini) from Turkmenistan.] 2 pp. Caucasian entomological bulletin 5(2): 279-280.

 Pérez J., 1895: Mission scientifique de M. Ch. Alluaud aux iles Séchelles (Mars-Avril-Mai 1892). Hyménoptéres. 8 pp. 

 Pérez J., 1895: Voyage de M. Ch. Alluaud aux iles Canaries (Novembre 1899 – Juni 1890). Hyménoptéres. 14 pp. 

 Pérez M. Q., 1931: Especies nuevas de Aphidiidae Espaňoles (Hym. Brac.). 60 pp. 

 Pérez M. Q., : Algunos Aphidiidae de Checoslovaquia (Hym. Brac.). 15 pp. 

 Pérez-d’Angelo V., 1973: El nido de Hypodynerus colocolo (Saussure1851) (Hymenoptera, Eumenidae). 2 pp. 

 Pergande T., 1901: The ant-decapitating fly. 5 pp. 

 Peris-Felipo F., Broad G. R., Belokobylskij S. A., 2014: Two new Afrotropical Asobara species (Hymenoptera: Braconidae) with complete notauli. 9 pp. Acta entomologica Musei nationalis Pragae 54(2): 693-701.

 Perkins J. F., 1939: Collecting Hymenoptera in Southern Skane. 4 pp. 

 Perkins J. F., 1942: A list of Serphinae collected in South Sweden (Hym. Serphoidea). 2 pp. 

 Perkins J. F., 1942: Hymenoptera Aculeata captured in Southern Skane, Sweden, in 1938. 11 pp. [M28] 

 Perkins J. F., 1953: Notes on British Ichneumoninae with descriptions of new species (Hym., Ichneumonidae). 72 pp. Bulletin of the British Museum (Natural History), Entomology 3(4): 103-176.

 Perkins J. F., 1957: Two new species of European Ephialtes (Scambus). 3 pp. 

 Perkins L., Sharp D., 1902: IX. On the generic characters of Hawaiian Crabronidae, four news genera characterized. 4 pp. 

 Perkins L., Sharp D., 1902: VIII. Four new species and a new genus of parasitic Hymenoptera (Ichneumonidae, sub-fam. Ophioninae) from the Hawaiian Islands. 3 pp. 

 Perkins R. C. L., 1901: Hermaphrodite Hawaiian Odynerus. 2 pp. 

 Perkins R. C. L., 1902: Notes on Hawaiian Wasps, with Descriptions of New Species. 10 pp. 

 Perkins R. C. L., 1911: New species of Hawaiian Hymenoptera, with notes on some previously described. 10 pp. 

 Perkins R. C. L., 1912: The Colour-groups ot the Hawaiian Wasps. etc. 25 pp. 

 Perkins R. C. L., 1913: Andrena nana of British authors distinct from A. nana of Kirby. 2 pp. 

 Perkins R. C. L., 1914: New species of Paralastor, Sauss. (Hymenoptera, fam. Eumenidae). 6 pp. 

 Perkins R. C. L., 1914: On hawaiian Ophioninae (Hymenoptera, Fam. Ichneumonidae). 15 pp. 

 Perkins R. C. L., 1915: Andrena falsifica n. n. for A. moricella, nec. 2 pp.