Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Subfamily Masarinae - Pollen Wasps

Pseudomasaris edwardsii - female Pseudomasaris sp. provisioning cells - Pseudomasaris edwardsii Pollen wasp - Pseudomasaris coquilletti - male OC Hymenoptera #16 - Pseudomasaris edwardsii - female Pseudomasaris Attempted Mating - Pseudomasaris vespoides - male - female Another Female Pollen Wasp from Tulare Co - Pseudomasaris vespoides - female 9058489 B&Y wasp - Pseudomasaris vespoides Pseudomasaris maculifrons - female
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)
Superfamily Vespoidea (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps and allies)
Family Vespidae (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps)
Subfamily Masarinae (Pollen Wasps)
14 spp. in our area (all Pseudomasaris), ~300 spp. in 14 genera of 2 tribes total(1)
10-20 mm
Yellow and black. FW with only two submarginal cells. Clubbed antennae are distinctive.
key to NA spp. in(2)
worldwide; in NA, western(1)
larvae (unlike those of other vespids) feed on pollen and nectar
Life Cycle
The females make nests of mud or sand attached to twigs or rocks. They provision the nests with pollen and nectar and lay their eggs. The eggs hatch into larvae that eat the provisions, then pupate and emerge as adults.
Print References
Bradley J.C. (1922) The taxonomy of the Masarid wasps, including a monograph of the North American species. UC Publ. Entomol. 1: 369-464. (Full text)
Works Cited
1.Checklist of species of the subfamily Masarinae (Hymenoptera, Vespidae)
Carpenter J.M. 2001. American Museum novitates 3325. 40 pp.
2.New records of Pseudomasaris Ashmead (Hymenoptera:Vespoidea, Masaridae), with notes on P. phaceliae Rohwer and P. cazieri Bohart
Richards O.W. 1966. Proc. R. Ent. Soc. London (B) 35(3-4): 47-55.
3.The Pollen Wasps
Sarah K. Gess. 1996.