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Types Mus. Comp. Zool. Harvard; Amer. Mus. Nat. Hist.
Major: yellow; rugoreticulum on head stretches from frontal carinae obliquely upward posterior to level of eye but does not reach the eye; pilosity dense, in full-face view fringing the head and on the first gastral tergite forming a very short, uniform felt; humerus subangulate; postpetiole from above oval, not angulate; scape at widest part of basal portion is 2X widest part of distal portion; pronotum smooth and shiny except for anterior fringe, which is carinulate.
Minor: posterior half of head completely smooth and shiny, pronotum sparsely foveolate, feebly shiny; propodeal spines reduced to denticles.
Measurements (mm) Lectotype major: HW 1.58, HL 1.60, SL 0.92, EL 0.20, PW 0.78. Paralectotype minor: HW 0.60, HL 0.74, SL 0.84, EL 0.12, PW 0.40. Color Major: concolorous yellow. Minor: concolorous light reddish brown.
Range Chisos Mts. of the Big Bend of southwestern Texas to the vicinity of Abilene and San Angelo, central Texas; probably also occurs in upland Chihuahua.
Biology Near San Angelo, Texas, Stefan Cover (unpublished notes) found a nest in a grassy flat, in clayey soil beneath a rock. Moody and Francke (1982) found numerous colonies in western Texas at 100-1700 m, nesting variously under stones, logs, cow dung, and under wood and fragments of metal, as well as in open soil.
Figure Upper: lectotype, major. Lower: paralectotype, minor. TEXAS: Chisos Mts., Big Bend of southwestern Texas (O. W. Williams). Scale bars = 1 mm.
Found most commonly in these habitats: 3 times found in juniper scrub, 1 times found in Oak-mesquite woodland, 1 times found in RR clearing, 1 times found in steep hillside, Hardwood forest, 1 times found in Tropical hardwood forest, 1 times found in Emory oak grove, 1 times found in pine-oak forest, 1 times found in steep hillside.
Found most commonly in these microhabitats: 6 times under rock, 1 times nest under rock, 2 times under stone, 1 times under boulder, 1 times in log.
Collected most commonly using these methods: 2 times direct collection, 1 times tuna bait.
Elevations: collected from 135 - 1676 meters, 641 meters average