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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Bombus citrinus - Lemon Cuckoo Bumble Bee

Bumblebee - Bombus citrinus - female Bumblebee on Joe-pye weed - Bombus citrinus - female Bombus unknown - Bombus citrinus - female bumblebee species - Bombus citrinus - female Bombus borealis? - Bombus citrinus - male Bombus affinis? - Bombus citrinus - male Bombus, a cuckoo - Bombus citrinus - male Bombus citrinus - Lemon Cuckoo Bumble Bee Male - Bombus citrinus - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Apinae (Honey, Bumble, Longhorn, Orchid, and Digger Bees)
Tribe Bombini (Bumble Bees)
Genus Bombus (Bumble Bees)
No Taxon (Subgenus Psithyrus)
Species citrinus (Lemon Cuckoo Bumble Bee)
Synonyms and other taxonomic changes
formerly placed in Psithyrus, which is now considered a subgenus of Bombus - see links below
Explanation of Names
citrinus means "lemon-yellow", and is the origin of the common name.
Author: Smith, 1854
mostly eastern North America - see
May to October.
Social parasites of other bumble bees including B. impatiens. Both sexes regularly visit flowers for nectar including composites. The Hosts section of its Discover Life species page lists known floral associations based on specimen records and images.
Internet References
common name reference; PDF doc (Committee on Common Names of Insects, Entomological Society of America)
discussion on subgenus Psithyrus plus list and distribution of world species (Natural History Museum, UK)
world bee genera plus synonyms and subgenera; list based on Michener, 2000 (Doug Yanega, U. of California at Riverside)