none Several parasites were found affecting foraging bumble bee gueens collected in the spring of 1982 and 1983 at 3 locations in sothwestern Virginia. Sphaerularia bombi Dufour (Nematoda: Tylenchia) occurred at low levels in all areas sampled, infestation rates ranging between 1.7 and 7.9% during the 2-year period. Parasitization by Locustacarus buchneri (Stammer) (Acari: Podapolipidae) ranged from 0 to 29.3%, and the mite appeared to be host-specific for B. bimaculatus Cresson and B. vagans Smith. Gregarious endoparasitic larvae, probably Syntretus sp. (Hymenoptera: Braconidae), were seen at levels ranging from 0-11.8%. Two types of phoretic mites were also common. Kuzinia americana Delfinado and Baker (Acaridae) were generally abundant at rates ranging from 12.3 to 69.6%. Parasitus spp. mites (Acari: Parasitidae) were carried by 4.9-37.2% of the queens. Bumble bee populations in southwestern Virigina probably are not seriously reduced by any of the parasites or commensals.