Petal, J. 1961. Materialy do znajomosci mrówek (Formicidae) Lubelszczyzny. (I-IV). Fragmenta Faunistica (Warsaw) 9:135-151.

Petal, J. 1963a ("1962"). Formica forsslundi Lohm. ssp. strawinskii n. ssp. Annales Universitatis Mariae Curie-Sklodowska. Sectio C. Biologia 17:195-202. PDF

Perris, E. 1876. Nouvelles promenades entomologiques. [part]. Annales de la Société Entomologique de France (5)6:177-244. PDF

Notes: First part of the article (pp. 171-176) was published 24 July 1876.

Perrault, G. H. 1986b. Gnamptogenys falcifera Kempf, 1967. Description de l'ouvrière et levée d'un doute (Hymenoptera, Formicidae). Revue Française d'Entomologie (Nouvelle Série) 8:157-159. PDF

Perrault, G. H. 1988a ("1987"). Notes sur des types de Pseudomyrmex décrits par F. Smith. I. (Hymenoptera, Formicidae). Nouvelle Revue d'Entomologie (n.s.)4:381-385. PDF

Perrault, G. H. 1988b ("1987"). Les fourmis de Tahiti. Bulletin de la Société Zoologique de France 112:429-446.

Perrault, G. H. 1988c. Octostrumma [sic] betschi, n. sp. de Guyane Française (Hymenoptera, Formicidae). Revue Française d'Entomologie (Nouvelle Série) 10:303-307. PDF

Perrault, G. H. 1986a. Gymnomyrmex villiersi, nouvelle espèce de Guyane (Hymenoptera, Formicidae). Revue Française d'Entomologie (Nouvelle Série) 8:1-4. PDF

Perkins, R. C. L. 1924. The aculeate Hymenoptera of Devon. Report and Transactions of the Devonshire Association for the Advancement of Science, Literature and Art 55:188-241.

Notes: Ants pp. 238-241.

Perrault, G. H. 1976. Description des ouvrières et des soldats de Oligomyrmex tahitiensis Wheeler. Mise au point concernant les sexués. Nouvelle Revue d'Entomologie 6:303-307. PDF

Perrault, G. H. 1981. Proceratium deelemani, nouvelle espèce de Kalimantan. Nouvelle Revue d'Entomologie 11:189-193. PDF

Perrault, G. H. 1993. Peuplement en fourmis de l'atoll de Fangataufa. Bulletin de la Société Entomologique de France 98:323-338. PDF

Pergande, T. 1900. Papers from the Harriman Alaska expedition. XVII. Entomological results (11): Formicidae. Proceedings of the Washington Academy of Sciences 2:519-521. PDF

Perkins, R. C. L. 1891. Male and worker characters combined in the same individual of Stenamma westwoodi. Entomologist's Monthly Magazine 27:123-124. PDF

Pergande, T. 1894. Formicidae of Lower California, Mexico. Proceedings of the California Academy of Sciences (2)4:161-165. PDF

Notes: Article is likely to have been published shortly after the pagebase date of 17 May 1894. Whole volume issued 28 September 1894.

Pergande, T. 1896. Mexican Formicidae. Proceedings of the California Academy of Sciences (2)5:858-896. PDF

Notes: Pagebase date is 30 December 1895. Publication is likely to have occurred within a week or two of this date. Whole volume issued 18 January 1896.

Perfecto, I.; Vandermeer, J. 1994. Understanding biodiversity loss in agroecosystems: reduction of ant diversity resulting from transformation of the coffee ecosystem in Costa Rica. Entomology (Trends in Agricultural Science) 2:7-13.

Pergande, T. 1893. On a collection of Formicidae from Lower California and Sonora, Mexico. Proceedings of the California Academy of Sciences (2)4:26-36. PDF

Notes: Pagebase date 19 September 1893 but article said to be "in press" in annual report for 1893 presented at the Academy meeting of 2 January 1894. Paper read by title at the Academy meeting of 6 November 1893. Whole volume issued 28 September 1894.

Perfecto, I.; Snelling, R. R. 1995. Biodiversity and the transformation of a tropical agroecosystem: ants in coffee plantations. Ecological Applications 5:1084-1097.

Penzig, O. 1895 ("1894"). Note di biologie vegetale. I. Sopra una nuova pianta formicaria d'Africa (Stereospermum dentatum Rich.). Malpighia 8:466-471. PDF

Peregrine, D. J.; Mudd, A.; Cherrett, J. M. 1974 ("1973"). Anatomy and preliminary chemical analysis of the post-pharyngeal glands of the leaf-cutting ant, Acromyrmex octospinosus (Reich) (Hym., Formicidae). Insectes Sociaux 20:355-363.

Penev, S.; Ronchetti, G. 1965. Ricerche sulla distribuzione delle formiche del gruppo Formica rufa nella Bulgaria nord-orientale. Collana Verde 16:305-311.

Peeters, C.; Hölldobler, B. 1992. Notes on the morphology of the sticky "doorknobs" of larvae in an Australian Hypoponera sp. (Formicidae; Ponerinae). Psyche (Cambridge) 99:23-30.

Peeters, C.; Hölldobler, B. 1995. Reproductive cooperation between queens and their mated workers: the complex life history of an ant with a valuable nest. Proceedings of the National Academy of Sciences of the United States of America 92:10977-10979.

Notes: Reproductive biology of Harpegnathos saltator.

Peeters, C.; Crozier, R. H. 1989 ("1988"). Caste and reproduction in ants: not all mated egg-layers are "queens". Psyche (Cambridge) 95:283-288.

Peeters, C.; Higashi, S. 1989. Reproductive dominance controlled by mutilation in the queenless ant Diacamma australe. Naturwissenschaften 76:177-180.

Peeters, C.; Crewe, R. M. 1987. Foraging and recruitment in ponerine ants: solitary hunting in the queenless Ophthalmopone berthoudi (Hymenoptera: Formicidae). Psyche (Cambridge) 94:201-214. PDF

Peeters, C.; Crewe, R. M. 1985. Worker reproduction in the ponerine ant Ophthalmopone berthoudi: an alternative form of eusocial organization. Behavioral Ecology and Sociobiology 18:29-37. PDF

Peeters, C.; Crewe, R. M. 1986. Queenright and queenless breeding systems within the genus Pachycondyla (Hymenoptera: Formicidae). Journal of the Entomological Society of Southern Africa 49:251-255.

Peeters, C.; Billen, J. P. J.; Hölldobler, B. 1992. Alternative dominance mechanisms regulating monogyny in the queenless ant genus Diacamma. Naturwissenschaften 79:572-573.