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Rapportages met beperkte oplage

1985: Zandbijen in het voorjaar – Afdelingsblad KNNV.
The earliest andrenid solitary bees of the season in the environment of Lelystad. [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 found 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 details of the recorded species. [Dutch]

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

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

1997: Bijen en graafwespen in Zand A72.
Hoofdstuk over Aculeata uit de KNNV-rapportage over drie jaar inventariseren van een in onbruik geraakt zanddepot ten noorden van Lelystad.

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

1998: Inventarisatie Kalklandje Crailoo, Hilversum.
The aculeate hymenopterans 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.
Introduction of the preliminary edition of the atlas to the wild bees of The Netherlands. [Dutch]

2000: Bijenwolf en harkwesp.
Kort artikel in Natuuronderzoek, nieuwsbrief Amsterdamse Waterleidingduinen, over het verschil tussen de harkwesp en de bijenwolf.

2001: Zandbijen in het Kuinderbos.
Article comparing Bembix rostrata with Philanthus triangulum, published in Natuuronderzoek, newsletter of the Amsterdamse Waterleidingduinen nature reserve. [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 – voorlopige uitgave.
Preliminary atlas to the wild bees of coastal nature reserve Amsterdamse Waterleidingduinen, highlighting 15 easily recognisable species for monitoring by volunteers. The final atlas was published in 2004 (below). [Dutch]

2004: Wilde bijen in de Amsterdamse Waterleidingduinen – uitgebreid overzicht van 85 soorten.
Distribution atlas of the 85 wild bees species that were found since 1980 in the Amsterdamse Waterleidingduinen coastal nature reserve. Providing distribution maps and descriptions of species, with special attention to sand dune vegetations as bee habitats. [Dutch]
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2010: Invertebraten van dynamische zeeduinen.
Overview of the rarest and most endangered invertebrates that depend on natural coasts or dynamic sanddune ecosystems for their survival. [Dutch]
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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 were still present in 2012. [Dutch]
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2013: Nulmeting bijenfauna Gooiseweg Zeewolde.
Baseline survey of bees, wasps and syrphids along motorway Gooiseweg, preceding a broadening of the road surface with special adaptations of the roadside for solitary bees. [Dutch]
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2016: De invloed van verstuivingsdynamiek op de insectenfauna van zeeduinen.
Survey of flower-visiting and predatory insects in Kennemerduinen coastal nature reserve. Report of the baseline inventory, preceding a large-scale operation aiming to restore drifting sand dynamics, and subsequent impact research. [Dutch]
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2016: Mieren en wespen in Lelystad.
Analytical review of 35 years of collecting and observing ants and wasps in Lelystad. Since 1981 approximately 180 species have been identified, among which several extremely rare and endangered species. The cuckoo wasp Chrysis terminata is introduced as a new species for the Dutch fauna. [Dutch]
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2018: Effectmeting bijenfauna 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]
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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. [Dutch]
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2022: Insecten in stuivende zeeduinen, onderzoek 2020.
Second impact study on the effects of re-introduced seawind dynamics in a coastal nature reserve, by removing parts of the coastal defence line between Zandvoort and IJmuiden. [Dutch]
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2022: Bijenhabitats in Flevoland, onderzoek 2021.
Inventory of wild bees in Voorsterbos area (Noordoostpolder), Hollandse Brug (Almere) and Winkelse zand (Zeewolde) as a contribution to the National Bee Strategy. [Dutch]
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2022: Bijenhabitats in Flevoland, onderzoek 2022.
Inventory of wild bees in Staartreservaat, Van der Lijnreservaat and Tollebekerbos
(Noordoostpolder), Knarbos Oost, Wildwallen and Burchtkamp (Lelystad),
as a contribution to the National Bee Strategy. [Dutch]
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2023: Bijenhabitats in Flevoland, onderzoek 2023.
Inventory of wild bees along the Burchttocht (Emmeloord),
near the Roggebotplas, at Roggebotstaete, along the Strandgaperbeek and at the Voorlanden beaches,
as a contribution to the National Bee Strategy. [Dutch]
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Artikelen in druk verschenen
1989: Insekteninventarisatie in Flevoland – Insektenfauna en natuurbeheer – Wetenschappelijke 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 apparently deformed specimen of the bethylid species Bethylus fuscicornis, 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]
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1998: Anteon pinetellum, a new Palaearctic dryinid – Entomologische Berichten.
All Anteoninae dryinid wasps with partially red or yellow heads were previously treated as varieties of the species Anteon ephippiger. However, specimens collected in Dutch pine forests proved to form a separate, valid species. [English]
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1999: New taxonomic status for Anteon faciale – Entomologische Berichten.
The original description (1860) of the dryinid wasp Anteon faciale (Hymenoptera: Dryinidae) seemed to contradict with the appearance of the species that it was synonymized with in 1984. The type specimen solved the problem. For the first time males of the species are described. [English]
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2001: Bethylidae – Entomofauna Germanica
Provisional checklist of all bethylid taxa ever recorded in Germany. Nomenclature is revised and updated. The genus Acephalonomia Strejcek is synonymised with Cephalonomia Westwood. [German]
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2002: Komen en gaan van de platkopwespenfauna in Flevoland – Entomologische Berichten
Observations in Flevoland revealed a curious colonisation process of 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]
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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 Amsterdamse Waterleidingduinen – Natuuronderzoek.
A population of the solitary bee Macropis Europaea was discovered in the Amsterdamse Waterleidingduinen. The species was never reported before in this sand dune nature reserve, where 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]
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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.
Bethylids reared from bracket fungi of dying beech trees in Veluwe National Park. [Dutch]
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2009: Bee- and wasp expedition on the Alp Flix – Jahresberichten der Naturforschenden Gesellschaft Graubόnden.
Report of an exploratory insect expedition at Alp-Flix, a traditionally grazed nature reserve at 2000 m. altitude in the Bόndner Alps. [English]
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2012: De Nederlandse bijen: bloedbijen (Sphecodes)
The genus Sphecodes in the distribution atlas of wild bees in The Netherlands, including detailed information on preferred food sources and kleptoparasitic relations. [Dutch]
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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 nature reserve. [Dutch]
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2020: Gonatopus pedestris, een nieuwe miertangwesp voor Nederland.
Discovery of a new dryinid species for The Netherlands. It was collected in the salt marshes of Verdronken land van Saeftinghe. After publication the species also appeared to be present in the north of the country.
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