A revision of the genus Zethus Fabricius in the Western by Richard Bohart and Lionel Stange

By Richard Bohart and Lionel Stange

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Extra resources for A revision of the genus Zethus Fabricius in the Western Hemisphere (Hymenoptera: Eumenidae)

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Museu Paulista 8: 466. Holotype "Jundiahy," Sao Paulo, Brazil (SPMZ). -Length to apex of tergite II about 16 mm (male), 21-23 mm (female). Black "rith yellow on apical one-third of male clypeus and on antennaI hook, sometimes small spots on female clypeus, scrobal spot, yellow on scape, small spots on legs, and subapical spots on tergite I; sometimes reddish are propodeum, abdomen, legs, mandible, female clypeus, tegula, and parategula; wings strongly brown stained, violaceous. Clypens with small scattered macropunctures interspersed with micropunctures; subhumeral area with moderate striae beluw, mostly micropunctate above; mesopleuTon, postscutellum and posterior face of propodeum with sparse, small punctures.

2 Distal lamella of tergite II more coriaceous, micropunctate, color about as on remainder of tergite; tergite I closely shagreened; stem of tergite II much broader than long; females only known 3 2. ans Zavattari B. Abdomen essentially blue or greenish blue 4 Abdomen yello\v or dark brown ' 5 4. Tergite I nearly as broad as long measured from subbasal carina; thorax essentially greenish blue, head blue \vith gena broadly red (northern Argentina) wagneri Bohart and Stange Tergite I less than one-half as broad as long measured from subbasal carina; thorax essentially black, gena dark brown (Surinam, French Guiana, Brazil, Bolivia) ehalybeus Saussure a • • • • • • • • • • • • • • • • • • • •• 38 University of California Publications in Entomology 19 prominens spinipes otomitus neotomjfus 23 huascari 24 26 wagner'; 27 bequaerti 28 bequaerti Figs.

Gigas has long been the name applied to this species and coeruleopennis has been considered a synonym of mexican·us Linnaeus. However, examination of the type of coeruleopennis has proved it to be conspecific with gigas. It is by far the largest species of Zethus and is related to chimorum. Both species have tergite II hardly raised at the base of the distal lamella and the male basitarsus of the foreleg is conspicuously compressed laterally. e on the mesopleuron of the female and the relatively smooth scutum of coeruleopennis are noteworthy.

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