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Reports in limited edition

1985: Zandbijen in het voorjaar – Afdelingsblad KNNV.
Andrenid solitary bees in the environment of Lelystad in spring. [Dutch]

1985: Papierwespen in Flevoland – Afdelingsblad KNNV.
Facts and myths about the social wasps of Flevoland. [Dutch]

1986: Mieren in Flevoland – Afdelingsblad KNNV.
Distribution and biology of the ants living in Flevoland. [Dutch]

1986: Inventarisatie Zanddepot A72/73 te Lelystad.
Report on a three year inventory of an out of use sand storage area north of Lelystad. [Dutch]

1990: Hommels in Flevoland – Afdelingsblad KNNV.
The bumblebees of Lelystad. Descriptions of and interesting facts about the found species. [Dutch]

1993: Insecteninventarisatie Corversbos Hilversum
Bees and wasps collected in the herbal garden of Corversbos Hilversum, information centre of the Natuurmonumenten foundation. [Dutch]

1994: Isecteninventarisatie Naardermeer.
Aculeata and Neuroptera collected in bird sanctuary Naardermeer, the first protected wetland of The Netherlands. [Dutch]

1997: Bijen en graafwespen in Zand A72.
Chapter on Aculeata in the KNNV-report on a three year inventory of an out of use sand storage area north of Lelystad. [Dutch]

1998: Inventarisatie Bergbos te Lelystad.
The Aculeate Hymenoptera of a relatively young broad-leaf forest, experimentally managed in a labour-extensive way. [Dutch]

1998: Inventarisatie Kalklandje Crailoo, Hilversum.
The Aculeate Hymenoptera of a nineteenth century railroad carbide dump, managed by the Goois Natuurreservaat Foundation for its special vegetation, characteristic for calcarious soils. [Dutch]

1999: Inheemse bijen in kaart gebracht.
Anouncement of the preliminary edition of the atlas to the Dutch wild bees. [Dutch]

2000: Bijenwolf en harkwesp.
Brief article in Natuuronderzoek, newsletter of the Amsterdamse Waterleidingduinen, about the difference between Bembix rostrata and Philanthus triangulum. [Dutch]

2001: Zandbijen in het Kuinderbos.
Short article for the management team of the Flevolandschap foundation, about the presence of an Andrenid solitary bee species in the most northern nature reserve of Flevoland. [Dutch]

1997-2001: verslagen Insectenwerkgroep KNNV Lelystad.
Summary of activities and observations by members of the insect research group KNNV, section Lelystad. [Dutch]

2002: Wilde bijen in de Amsterdamse Waterleiding-duinen.
Preliminary atlas of fifteen easy to recognize species of wild bees in the coastal nature reserve AWD. Selection of text for the complete atlas (see 2004)
. [Dutch]
2004: Wilde bijen in de Amsterdamse Waterleidingduinen – uitgebreid overzicht van 85 soorten.
Distribution atlas of the 85 wild bees species found in the AWD coastal nature reserve since 1980. With distribution maps and descriptions of each species. Also information about the various sand dune vegetations with special reference to their meaning as bee habitats and advice for management. [Dutch]
download PDF 1.6 Mb

2010: Invertebraten van dynamische zeeduinen.
Overview of the rare and endangered invertebrates that depend on natural coasts or dynamic sanddune ecosystems for their survival. [Dutch]
download PDF 540 Kb

2013: Wilde bijen in Lelystad.
Three decades of research on the bees of Lelystad, a city built on land that was reclaimed from the sea in 1957. Despite its ecological isolation no less than 120 species were recorded, of which at least 75 could be found in 2012. [Dutch]
download PDF 4 Mb

2013: Nulmeting bijenfauna Gooiseweg Zeewolde.
Baseline survey of bees, wasps and syrphids along motorway De Gooiseweg, preceding a broadening of the road with special adaptations of the roadside for solitary bees. [Dutch]
download PDF 1.9 Mb

2016: De invloed van verstuivingsdynamiek op de insectenfauna van zeeduinen.
Survey of flower-visiting and predatory insects in the Kennemerduinen coastal nature reserve. Summary of the baseline inventory, preceding a large-scale operation aiming to restore drifting sand dynamics, and the final impact research. [Dutch]
download PDF 7.1 Mb

2016: Mieren en wespen in Lelystad.
Analytical review of 35 jaar collecting and observing ants and wasps in Lelystad. Since 1981 approximately 180 species have been identified, among which a number of extremely rare and endangered species. The cuckoo wasp Chrysis terminata is introduced as a new species for the Dutch fauna. [Dutch]
download PDF 6.4 Mb

2018: Effectonderzoek bijenberm Gooiseweg Zeewolde.
Impact study on the effects of planting flower-bearing shrubs or herbs for bees
along roadsides. New insights on threats for honey bees lead to the conclusion that solitary wild bees deserve more attention. [Dutch]
download PDF 2.2 Mb

2019: Bijenhabitats in Flevoland.
Inventory of wild bees in Kuinderbos, Larserbos, Horsterwold and the randmeerstranden of Dronten in the context of the National Bee Strategy. The present bee fauna is evaluated on the basis of historical data.
download PDF 3.1 Mb

Articles published in print

1989: Insekteninventarisatie in Flevoland – Insektenfauna en natuurbeheer – Wetensch. Mededeling KNNV nr. 192.
Report on five years of research of the aculeate hymenoptera in the former sand storage area A72/73 in Lelystad. With checklist of found species and remarks on the management strategy. [Dutch]

1994: Bethylus hyalinus, a freak after all! – Entomologische Berichten
An obviously deformed specimen of the bethylid species Bethylus fuscicornis, which was described as a new species in 1874, was recovered in the collection of the Natural History Museum in Budapest after having been missing for many years. [English]
download PDF 168 Kb

1998: Anteon pinetellum, a new Palaearctic dryinid – Entomologische Berichten.
All Anteoninae dryinid wasps with partially red or yellow heads were previously considered to be varieties of the species Anteon ephippiger. With a combination of physical features and ecological data is stated that the populations of pine forests form an at the time unknown, but valid species. [English]
download PDF 423 Kb

1999: New taxonomic status for Anteon faciale – Entomologische Berichten.
De original description in 1860 of the dryinid wasp Anteon faciale (Hymenoptera: Dryinidae) seemed to contradict in every way with the appearance of the species it was synonymized with in 1984. The type specimen solved the problem. For the first time males of this species are described. [English]
download PDF 280 Kb

2001: Bethylidae – Entomofauna Germanica
Checklist of all bethylid species known from Germany with every state mentioned where specimens have been found. Nomenclature is revised and updated. The genus Acephalonomia Strejcek is synonymized with Cephalonomia Westwood. [German]
download PDF 75 Kb

2002: Holland op z'n platst – Entomologische Berichten
Observations in Flevoland revealed a curious colonization process by bethylid wasps. The numbers of brachypterous and fully winged specimens of Bethylus fuscicornis appeared to develop in opposite direction after arrival in the new land. [Dutch]
download PDF 358 Kb

2003: De graafwesp Passaloecus brevilabris nieuw voor de Nederlandse fauna (Hymenoptera: Crabronidae)
First sighting in The Netherlands of this small but mysterious wasp. A number of characteristics is given to enable easy distinction from the other Dutch Passaloecus-species. [Dutch]

2004: De slobkousbij in de AWD – Natuuronderzoek.
A population of the solitary bee Macropis Europae was discovered in the Amsterdamse Waterleidingduinen. The species was never reported before in this popular sand dune nature reserve, while bee records have been extensively recorded since the 19th century. [Dutch]

2004: De Wespen en Mieren van Nederland, Nederlandse Fauna 6 – EIS / KNNV / Naturalis.
Atlas of the aculeate wasps and ants in The Netherlands. Chapters by J. de Rond: Bethylidae, Dryinidae and Embolemidae. Appearance, biology and distribution in The Netherlands of 55 species. [Dutch]
download PDF 3.2 Mb

2005: Vrije bijen in de AWD – Natuuronderzoek.
In the Amsterdamse Waterleidingduinen a cluster of feral honeybee colonies appeared to have been housing in a White poplar forest for at least half a century. It turned out to be a population of nearly pure Black bees, the original endemic honeybee subspecies of Western Europe. [Dutch]

2005: Wilde bijen van de Noord-Hollandse duinen – Tussen Duin en Dijk 4/2.
Review of the Noord-Holland province coastal sanddune areas and their wild bees. For each vegetation type a few typical bee species are described and their ecological position is analysed. [Dutch]

2007: Leen Moraal & Jeroen de Rond. Nieuwe vindplaatsen van de zwamplatkop Cephalonomia formiciformis – Entomologische Berichten
Results of research on the insects of a beech graveyard in the Veluwe National Park. [Dutch]
download PDF 170 Kb

2009: Bee- and wasp expedition on the Alp Flix – Jahresberichten der Naturforschenden Gesellschaft Graubόnden
Report on an orientating insect inventory at Alp-Flix, a traditionally grazed nature reserve on an altitude of 2000 m. in the Bόndner Alps. [English]
download PDF 2.2 Mb

2019: De platkopwesp Cephalonomia mycetophila nieuw voor de Nederlandse fauna.
Species of the Cephalonomia formiciformis-aggregate live in bracket-fungi and are rarely found. In 2018 the largest species of this group was collected with a pitfall trap in Nationaal Park Zuid-Kennemerland
. [Dutch]
download PDF 538 Kb