Petralia, R. S.; Vinson, S. B. 1980 ("1979"). Comparative anatomy of the ventral region of ant larvae, and its relation to feeding behavior. Psyche (Cambridge) 86:375-394. PDF

Górny, M.; Grüm, L. (eds.) 1993. Methods in soil zoology. Amsterdam: Elsevier, xii + 459 pp.

Petal, J.; Pisarski, B. 1993. Formicidae. Pp. 253-262 in: Górny, M.; Grüm, L. (eds.) 1993. Methods in soil zoology. Amsterdam: Elsevier, xii + 459 pp.

Petersen, B. 1968. Some novelties in presumed males of Leptanillinae (Hym., Formicidae). Entomologiske Meddelelser 36:577-598. PDF

Petersen-Braun, M.; Buschinger, A. 1975. Entstehung und Funktion eines thorakalen Kropfes bei Formiciden-Königinnen. Insectes Sociaux 22:51-66.

Petal, J. 1963b. Materialy do znajomosci mrówek (Formicidae, Hymenoptera) Lubelszczyzny (V-VI). Fragmenta Faunistica (Warsaw) 10:463-472. PDF

Petal, J. 1963c. Données pour la morphologie de Myrmica rugulosoides For. et Leptothorax nigrescens Ruzsky (Hymenoptera, Formicidae). Bulletin de l'Académie Polonaise des Sciences. Série des Sciences Biologiques 11:379-382. PDF

Petal, J. 1964 ("1963"). Fauna mrówek projektowanego rezerwatu torfowiskowego Rakowskie Bagno k. Frampola (woj. lubelskie). Annales Universitatis Mariae Curie-Sklodowska. Sectio C. Biologia 18:143-173. PDF

Petal, J. 1968 ("1967"). Materialy do znajomosci mrówek (Formicidae, Hymenoptera) Lubelszczyzny. VII. Zespoly mrówek srodowisk torfowiskowych, lesnych i wydmowych okolic Libiszowa (pow. Parczew). Annales Universitatis Mariae Curie-Sklodowska. Sectio C. Biologia 22:117-127.

Petal, J. 1993 ("1991"). Diversity of ant communities in peatbogs of various origin and period under management. Polish Ecological Studies 17:249-265.

Perris, E. 1878 ("1877"). Rectifications et additions à mes promenades entomologiques. Annales de la Société Entomologique de France (5)7:379-386. PDF

Perty, M. 1833. Delectus animalium articulatorum, quae in itinere per Brasiliam annis MDCCCXVII-MDCCCXX jussu et auspiciis Maximiliani Josephi I. Bavariae regis augustissimi peracto, collegerunt Dr. J. B. Spix et Dr. C. F. Ph. de Martius. Fasc. 3. Monachii [= Munich]: published by the author, pp. 125-224.

Péru, L. 1984. Individus tératologiques chez les fourmis Leptothorax. Actes des Colloques Insectes Sociaux 1:141-149.

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.