Pulp and paper advisory group: draft resolution approved by Committee II on 25 May 1957

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Documento informativo acerca de la asistencia técnica que se presta a los países y territorios de América Latina en virtud del programa ampliado = Information paper on technical assistance provided to countries and territories of the ECLA region

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Actividades de asistencia técnica en América Latina durante 1958 = Information paper on technical assistance provided to countries and territories of the ECLA region under the extended programme

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Biological notes on the parasitism of apoica flavissima Van der Vecht (Hymenoptera: Vespidae) by Seminota marginata (Westwood) (Hymenoptera: Trigonalidae): Are social paper wasps primary or secundary hosts of trigonalidae?

Hosts of Trigonalidae include larvae of social paper wasps, which have been considered secondary hosts, supposedly following predation of the primary host (usually caterpillars) by adult wasps. This study provides observations on biological aspects of the parasitism of Apoica flavissima Van der Vecht by Seminota marginata (Westwood), and suggests that social wasps may be both primary and secondary hosts, whereas they extract and chew vegetable fiber.