Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Species Pseudomasaris vespoides

wasp with clubbed antennae - Pseudomasaris vespoides - male Pollen Wasp - Pseudomasaris vespoides - female Male Pollen Wasp - Pseudomasaris vespoides - male Another Male Pollen Wasp from Tulare Co - Pseudomasaris vespoides - male Male Anthidium Bee? - Pseudomasaris vespoides - male Pseudomasaris vespoides - male Pseudomasaris? - Pseudomasaris vespoides Which Pseudomasaris? - Pseudomasaris vespoides - 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)
Genus Pseudomasaris
Species vespoides (Pseudomasaris vespoides)
Explanation of Names
Pseudomasaris vespoides (Cresson 1863)
A sharp transverse ridge right above antennal sockets sets females of this species apart from congeners. Males can be separated from their congeners by the antennal club being longer than antennomere III, and concave on the underside. Gastral tergite VII (almost always) has a pair of dorsal tubercles. Fore basitarsus with a long posterior fringe; hind basitarsus is curved and distally lobed.(1)
Pale markings tend to be less extensive in individuals of northerly populations; they're also more whitish than yellowish. (Roy Snelling, Nat. Hist. Mus. of Los Angeles Co., pers. comm. to HW)
w US (WA-CA to SD-NM) to Baja(2)
Adults found on/near Penstemon spp., feed on nectar; females collect pollen for larvae
Print References
Longair R.W. (1987) Mating behavior at floral resources in two species of Pseudomasaris (Hymenoptera: Vespidae: Masarinae). Proc. Ent. Soc. Wash. 89: 759-769. Full text
Torchio P.F. (1974) Mechanisms involved in the pollination of Penstemon visited by the masarid wasp Pseudomasaris vespoides (Cresson). Pan-Pac. Entomol. 50: 226-234.
Works Cited
1.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.
2.Checklist of species of the subfamily Masarinae (Hymenoptera, Vespidae)
Carpenter J.M. 2001. American Museum novitates 3325. 40 pp.