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Superfamily Vespoidea - Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps and allies

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The species of Pseudomasaris Ashmead (Hymenoptera, Masaridae)
By Richards O.W.
UC Publ. Entomol. 27: 283-310, 1963

New records of Pseudomasaris Ashmead (Hymenoptera:Vespoidea, Masaridae), with notes on P. phaceliae Rohwer and P. cazieri Bohart
By Richards O.W.
Proc. R. Ent. Soc. London (B) 35(3-4): 47-55, 1966

Revision of the genus Parazumia de Saussure (Hymenoptera: Vespidae: Eumeninae)
By Carpenter J.M., Garcete-Barrett B.R.
Folia Entomol. Mex. 44 (supl. 1): 21-34, 2005

Review of Maricopodynerus (Hymenoptera: Eumenidae)
By Bohart R.M.
Proc. Ent. Soc. Wash. 91: 575-582, 1989

The genus Pachodynerus in North America (Hymenoptera: Vespidae: Eumeninae)
By Carpenter J.M.
Proc. Ent. Soc. Wash. 88: 572-577, 1986
Full text

Note: some of the species names used in this paper are no longer valid

Revisión del género Pachodynerus Saussure (Hymenoptera: Vespidae, Eumeninae)
By Willink A., Roig-Alsina A.
Contrib. Am. Entomol. Inst. 30: 1-117, 1998

Classification and evolution of the eumenine wasp genus Symmorphus Wesmael (Hymenoptera: Vespidae)
By Cumming J.M.
Mem. Ent. Soc. Canada 148. 168 pp., 1989
Googlebook preview; most of the content available here (PhD disser.)

A revision of the North American species in the genus Leptochilus (Hymenoptera: Eumenidae)
By Parker F.D.
Misc. Publ. Ent. Soc. Am. 5: 153–229, 1966

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