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Genus Pseudomasaris

Pollen wasp - Pseudomasaris vespoides - male Female Pseudomasaris on Phacelia in Anza-Borrego - Pseudomasaris maculifrons - female Pseudomasaris edwardsii - male Pseudomasaris? - Pseudomasaris vespoides Which Pseudomasaris? - Pseudomasaris vespoides Genus Pseudomasaris - Pseudomasaris vespoides unkn bee - Pseudomasaris vespoides - male Pseudomasaris vespoides - 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)
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)
Genus Pseudomasaris
14 spp. in our area, 15 total(1)
key to spp. in(2)
Western North America north to 50°N(3)
Semiarid to arid areas where preferred plants occur
Mainly oligolectic, favoring Phacelia, Eriodictyon (both Hydrophyllaceae s.s.), or Penstemon species. Adults may take nectar from plants of other families; females provision offspring with a mixture of pollen and nectar.(3)
According to Rob Longair, in North America tend to be limited to mid-elevations and are often very seasonal, appearing over a few weeks in early- to mid-summer in Colorado and Alberta. They form mud nests on rocks and these are incredibly hard to find.
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.