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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Type: Zethus sichelianu8 Sanssure, by present designation. Laboides Zavattari, 1912. Arch. f. N aturgesch. 78 (Abt. A), Heft 4: 65. Type: Labus siohelianus Saussure by present designation. te to coarsely striate but without regular longjtumnal microstriae; maxillary palpus usually with six palpomeres but in some groups with five, four, or three; stem of tergite II usually shorter than that of I but in some groups equal to or longer than that of I; mid tibia usually with two apical spurs but in some species with only one.

Female clypeus and suboeellar area including interantennal area 'with small, wel1spaced striatiform punctures and some very fine striae; pronotum and scutum densely shagreened between moderate macropunctures; scutum separated from scutellum by a row of inconspicuous carinulae, scutellum only faintly depressed posteromediany; propodeum ,vith unusually deep and narro,\v median channel abruptly separated from small dorsal ridge, posterior face striate submedially, granulate toward wing base. Male mandible deeply incised behind large apical tooth, antennal hook about as in dreisbachi; male clypeus with apical margin bidentate, preceded by some'what rounded rim; male fore basitarsus moderately compressed laterally and somewhat twisted, basal and apical breadth subequal in thin side view; pronotum rounded between humerus and tegula, latter with outer edge nearly evenly rounded as seen from directly above; petiole broadly rounded dorsally; sternite II evenly convex, tergite II abruptly raised at base of distal lamella, latter nearly impunctate and densely shagreened; male genitalia (figs.

Tergite II rather thickly covered ,vith short erect pubescence (best seen in profile) ; of female with a small medio-apical dent; clypeus of male conical in profile; male mandible rather simply four toothed (fig. (Mexico) dreisbachi Bohart and Stange Tergite II with very sparse pubescence; clypeus of female not dented along distal rim; clypeus of male gently convex; male mandible deeply incised behind partly double apical tooth (fig. -Length to apex of tergite II about 21 mm. Black with yell0'w scrobal spot and broken subapical band on tergite I.

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