Memo - Monitoring exotic mosquitoes in Belgium is a sampling event dataset published by the Institute of Tropical Medicine Antwerp (ITM). It is part of the early detection of exotic mosquito species (EMS) along high-risk introduction routes in Belgium, in which data are collected at defined locations using a standardized protocol. This dataset contains mosquito trap counts for Culicidae. Here, it is published as a standardized Darwin Core Archive and includes for each sampling event an eventID, date, location and sampling protocol (in the event core), and for each occurrence an occurrenceID, the number of recorded individuals, status, (present/absent), information on the identification and scientific name (in the occurrence extension). Issues with the dataset can be reported at https://github.com/BelgianBiodiversityPlatform/data-publication-ITG/issues We have released this dataset to the public domain under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. We would appreciate it if you follow the INBO norms for data use (https://www.inbo.be/en/norms-data-use) when using the data. If you have any questions regarding this dataset, don't hesitate to contact us via the contact information provided in the metadata.