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Costa Rica: southern highlands, Cordillera de Tilar‡n.
I collected the type specimens of this species in a montane moist forest habitat, in a Winkler sample of sifted leaf litter from the Wilson Botanical Garden. I collected the species a second time in a small fragment of montane riparian forest, at the Los Llanos Biological Station near Monteverde. This is also a mid-montane moist forest habitat. I found a nest by following workers recruiting to cookie crumbs. The nest was in a rock crevice in the splash zone of a small stream.
Diagnosis A distinctive medium-sized member of the flavensHNS group with long, dense pilosity and dark brown body contrasting with yellow tarsi, in both castes. Similar to albipesHNS, alticolaHNS, browniHNS, ebeninaHNS, euryscopaHNS, hedlundorumHNS, monteverdensisHNS, palenquensisHNS, and serviliaHNS, differing as follows.
Major: eyes set well forward on head; humerus in dorsal-oblique view subangulate; extensive foveolation of mesopleuron and propodeum.
Minor: occiput in full-face view narrow and eyes placed more forward. measurements (mm) Holotype major: HW 1.00, HL 1.04, SL 0.64, EL 0.14, PW 0.50. Paratype minor: HW 0.54, HL 0.56, SL 0.62, EL 0.12, PW 0.34.
color Major and minor: body dark brown, tarsi dark yellow, other appendages light brown.
Range Southern highlands of Costa Rica (J. T. Longino 1997).
Biology Occurs in leaf litter of mature wet montane forest (Longino 1997).
Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: 4 km south of San Vito, Puntarenas, 8AÃ‚Â°47'N 82AÃ‚Â°58 W, 1200 m (John T. Longino). Scale bars = 1 mm.
Found most commonly in these habitats: 5 times found in 1° wet forest stream edge, 5 times found in mature rainforest, edge of forest near pasture and agricultural land, steep rocky terrain, 1 times found in rainforest stream edge, 1 times found in riparian forest in steep ravine, 4 times found in montane wet forest, 1 times found in mature wet forest, 1 times found in montane wet forest, in matrix of pasture and forest, probabl old 2nd growth, 1 times found in montane wet forest, near streams.
Found most commonly in these microhabitats: 5 times streamside bait, 8 times at bait, 1 times Ex sifted leaf litter from forest below Wilson Botanical Garden. Forest very dry, 1 times recruiting to cookie bait, 1 times nocturnal strays, 1 times Hojarasca, second growth, vegetation only about 4m high, climbing steeply, 1 times Hojarasca.
Collected most commonly using these methods: 8 times baiting, 2 times search, 2 times Mini Winkler, 2 times Malaise.
Elevations: collected from 120 - 1500 meters, 542 meters average