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The genus Polistomorpha (Hymenoptera: Leucospidae) is exclusive to the Neotropical region, comprising seven species. Polistomorpha fasciata has previously been recorded in the Brazilian states of Amapá, Amazonas, Pará, and São Paulo. This study presents the first record of P. fasciata from Northeast Brazil, parasitizing Euglossa cordata within a Restinga ecosystem. Additionally, it provides an extended diagnosis and illustrations of P. fasciata, E. cordata, and its nest. El género Polistomorpha (Hymenoptera: Leucospidae) es exclusivo de la región neotropical, con siete especies, seis de ellas en Brasil. Polistomorpha fasciata se registró anteriormente en Amapá, Amazonas, São Paulo y Pará. Este estudio proporciona el primer registro de P. fasciata en el Noreste de Brasil, parasitando a Euglossa cordata en un ecosistema de Restinga. También incluye un diagnóstico ampliado e ilustraciones de P. fasciata, E. cordata y su nido.

An overview of the family Leucospidae (Hymenoptera, Chalcidoidea) is provided for the leucospid fauna of the Arabian Peninsula. Two genera containing four species are identified based on morphometrics and colour patterns. One species, Leucospis ayezae Usman, Anwar & Ahmad, sp. nov. , is described. Leucospis elegans Klug had been previously recorded from Arabia Felix (= Yemen) and is recorded here for the first time from Saudi Arabia. The status of Leucospis aff. namibica from Yemen has been clarified, and this species is placed here in the genus Micrapion Kriechbaumer as M. clavaforme Steffan. An updated key and a map showing the distribution of the family Leucospidae in the Arabian Peninsula is provided. The occurrence and color morphs of all leucospid species that have been recorded so far from the region are briefly discussed.

The fauna of Iranian Leucospidae and Tetracampidae (Hymenoptera: Chalcidoidea) is summarized in this paper. A total of six species of Leucospidae (all within the genus Leucospis Fabricius, 1775) and four species of Tetracampidae (within four genera, Epiclerus Haliday, 1844, Foersterella Dalla Torre, 1897, Platynocheilus Westwood, 1837 and Tetracampe Förster, 1841) are listed as the fauna of Iran. Platynocheilus cuprifrons (Nees, 1834) (Tetracampidae) is a new record for the fauna of Iran.

This work presents a review of natural enemy species associated with Centrisanalis and summarizes the available information on life history, behavior, diversity, and specialization of these taxa. Records include over 20 species in ten genera from seven distinct families of Hymenoptera, Diptera and Coleoptera. These species are cleptoparasites or parasitoids of immature stages or adults. Some species seem to be occasional parasitoids, while others seem to be more frequent and responsible for significant mortality rates of immatures in nests. Three families of Hymenoptera represent the majority of natural enemy taxa found in C.analis nests: Apidae, Chrysididae, and Leucospidae. The most frequent parasitoid reared from nests was the wasp Leucospiscayennensis Westwood, followed by cleptoparasitic bee species of the genus Coelioxys Latreille. Vouchers of trap nest studies are identified for the first time and refer to Coelioxysnigrofimbriata Cockerell, which seems to have a strong association with nests of C.analis. Further direct observation notes about biology and behavior of C.nigrofimbriata are also provided.

The Chinese fauna of the family Leucospidae (Hymenoptera, Chalcidoidea) is reviewed and illustrated for the first time. Twelve species of Fabricius, 1775 are recorded; of which two species are new to science: and and one species is reported new for China: Illiger, 1807. An identification key to Chinese species is included. A lectotype is designated for Shestakov, 1923.

Dos especies de Leucospis se reportan por primera vez para Colombia Leucospis aliena y Leucospis enderleini. Teniendo en cuenta estos nuevos registros, el número de especies de Leucospis reportadas para el país se eleva a 11. Además se reporta una nueva localidad en Colombia para Leucospis colombiana en el departamento del Magdalena y un registro adicional para Polistomorpha conura en el departamento del Amazonas. Los especímenes se encuentran depositados en la colección entomológica del Museo José Hernández Camacho del Instituto de Investigación de Recursos Biológicos Alexander von Humboldt (IAvH-E), Villa de Leyva (Boyacá, Colombia).

The parasitic behavior of Leucospis cayennensis Westwood, the rates of parasitism and other mortality factors in populations of Centris analis (Fabricius), were studied on the campus of the University of São Paulo, Ribeirão Preto, SP, Brazil, from May 1996 to April 1999. The host species nested in cardboard trap-nests. Parasite activity was monitored throughout the host's nesting periods. The attacks to the nests began from one to five months after the nesting activities of the host had been initiated and ended within one month after nesting activity stopped. The parasites attacked the cells in several ways: 1) ovipositing through the side wall of the nest; 2) by entering the unplugged or abandoned nests and ovipositing through the cell partition of the last constructed brood cell; 3) by breaking through the nest plug, entering the nest and ovipositing through the cell partition or, 4) by trying to reach the host cell by inserting their ovipositor through the nest plug and cell partition. Most attacks were made on cells containing host prepupae or pupae. The eggs were placed inside the host cocoons attached to the lateral wall of the cocoon, to the cellular partition, or on the surface of the host. The total duration from attack to adult emergence took 24 to 56 days for females and 23 to 49 days for males. Leucospis cayennensis was the most destructive enemy of C. analis, accounting for 83.8% and 91.7% of parasitized cells in each year. Coelioxys sp. and Mesocheira bicolor (Fabricius) were the other insect parasites associated with the nests of C. analis.