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10a. Mesosomal dorsum bare, lacking erect setae or conspicuous long pilosity: 20
10b. Mesosomal dorsum with conspicuous erect setae and/or pubescence: 40
20a. Head and mesosoma light brown, with contrasting dark gaster: lutosus
20b. Head and mesosoma black, concolorous with gaster: 30
30a. Mesonotum in dorsal view about as long as wide: laminatus
30b. Mesonotum wider than long: lamellosus
40a. Dorsal and posterior faces of propodeum separated by a well-defined transverse flange: 50
40b. Dorsal and posterior faces of propodeum meeting at rounded to sharp angle, sometimes short tuberculate, but never produced as a projecting flange: 90
50a. Scapes with abundant erect setae: 60
50b. Scapes with erect setae sparse to absent: 80
60a. Petiolar summit (anterior view) more or less transversely truncate, usually crenulate, with lateral margins well differentiated from those of spine: bispinosus
60b. Petiolar summit not transversely truncate, lateral margin continuing and tapering into spine: 70
70a. Vertex margin strongly concave: validus
70b. Vertex margin weakly concave, nearly flat: curvilobus
80a. Face and mesosomal dorsum foveate; pronotal humeri with acute spines: setosus
80b. Face and mesosomal dorsum sublucid, not foveate; pronotal humeri in the form of right to slightly acute angles, but not produced as distinct spines: schulzi
90a. Head and mesosoma red brown, with contrasting dark brown gaster; anterodorsal pronotum long and tapering, with no development of humeri: diversus
90b. Head and mesosoma black, concolorous with gaster; pronotum transverse, with spiniform humeri: 100
100a. Scapes with few or no erect setae: debilis
100b. Scapes with abundant erect setae: inermis
Page author:
John T. Longino, The Evergreen State College, Olympia WA 98505 USA.longinoj@evergreen.edu
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