Some interesting records on Dutch bees (Hymenoptera: Apidae) The publication of the preliminary atlas of Dutch bees (Peeters et al. 1999) has stimulated many specialists in their mapping activity. The author reports several interesting new distribution records on ten bee-species in 1999. The Dutch Colletus halophilus Verhoeff, 1943 were thought to be specialized on Aster, but on the island Rottumeroog some, relatively large, females were observed collecting pollen on Sonchus arvensis var. maritimus.