Tapinoma sessile ^HNS (Say 1836)

Neotype. Worker, with the following measurements (see Table 2 for full character definitions): HL, 0.68 mm; HW, 0.60 mm; SL, 0.60 mm; EL, 0.18 mm; MFC, 0.18 mm; EW, 0.14 mm; FL, 0.50 mm; LHL, 0.40 mm; PW, 0.42 mm; ES, 2.52 mm; SI, 88.2; and CI, 88.20. The neotype resides in the collection of the Museum of Comparative Zoology (MCZ) at Harvard University and bears the following labels:

USA Posey Co.

New Harmony, IN

21- VI-09, 110 m

38.130° N, 87.935° W

Coll by: C. A. Hamm

Nest in soil next to house 5 m from grave of T. Say

This concolored black specimen does not differ in any significant way from the descriptions of Say (1836) and Shattuck (1992,1995). This specimen will carry a label designating it as the neotype. Additional material collected from this series has been deposited at the UCDC, MCZ, MSUC, and LACM.

Material Examined. (LACM, UCDC, CSUF, CASC, UCBC, CIDA, MSUC, PSWC). Arizona: Oak Creek Canyon, Coconino County. California: Quincy, Butte County; South Lake Tahoe, El Dorado County; McK- enzie Table Mountain Preserve, Miller Preserve at Black Mountain Fresno County; Wyman Canyon, Inyo County; Eagle Lake Field Station, Lassen County; Agoura, Westwood Hills, Tan Bark Flat Los Angeles County; Coarsegold, Madera County; Ukiah, Mendocino County; Sagehen Creek, NV County; Lake Forest, orange County; Millard Canyon, Riverside County; Temecula Canyon, Riverside County; Woodcrest, Riverside County; Woodside, Riverside County; Big Bear, Arrowhead San Bernardino County; Los Perl asquitos Creek, Sweetwater River San Diego County; San Simeon, San Luis Obispo County; Los Olivos, Santa Barbara County; Redding, Shasta County; Russian River, Sonoma County; Sequoia National Park, Tulare County; Columbia, Tuolumne County; Moss Landing Marine Laboratories, Monterey County; Big Creek Reserve, Monterey County; ojai, Ventura County; Stebbins Cold Canyon Reserve, Yolo County; Davis, Yolo County. Colorado: Fort Collins, Larimer County; Vail, Eagle County. Illinois: Champaign, Champaign County. Indiana: Cedar Lake, La Grange County; New Harmony, Posey County. Louisiana: Alexandria, Rapids Parish. Nevada: Mt. Wheeler, Verdi, Washoe County; Lehman Caves, White Pine County. New Jersey: Camp Louemma, Sussex County. North Dakota: Montrose Township, Cavalier County; Golden Township, Walsh County; Roosevelt National Memorial Park, Billings County; Grand Forks, Grand Forks County. Michigan: Wakelee Fen, Cass County; MacCready Preserve, Jackson County. Oregon: South Cottage Grove, Lane County. UTAH: Bassets Spring, Uinta County. Montana: Browning, Glacier County. Washington: San Juan Island, San Juan County. Wisconsin: Madison, Dane County.

To further aid in the delimitation of T. sessile ^HNS, the following means (± SD) are provided (n = number specimens examined) (see Table 2 for full character deinitions).

Worker. (n = 427). HL, 0.68 ± 0.06 mm; HW, 0.63 ± 0.08 mm; SL, 0.64 ± 0.07 mm; EL, 0.17 ± 0.02 mm; MFC, 0.22 ± 0.03 mm; EW, 0.14 ± 0.02 mm; FL, 0.53 ± 0.09 mm; LHL, 0.46 ± 0.08 mm; PW, 0.43 ± 0.05 mm; ES, 2.33 ± 0.47 mm; SI, 93 ± 3.58; and CI, 91.5 ± 4.39.

Male. (n = 59). HL, 0.71 ± 0.05 mm; HW, 0.73 ± 0.06 mm; SL, 0.69 ± 0.06 mm; EL, 0.29 ± 0.02 mm; MFC, 0.22 ± 0.02 mm; EW, 0.34 ± 0.02 mm; FL, 0.76 ± 0.07 mm; LHL, 0.65 ± 0.06 mm; PW, 0.75 ± 0.07 mm; MML, 1.09 ± 0.10 mm; WGL, 3.35 ± 0.31 mm; ES, 6.98 ± 1.04 mm; SI, 96.4 ± 4.81; and CI, 103 ± 2.62.

Queen. (n = 64). HL, 0.80 ± 0.05 mm; HW, 0.85 ± 0.05 mm; SL, 0.73 ± 0.06 mm; EL, 0.26 ± 0.02 mm; MFC, 0.28 ± 0.04 mm; EW, 0.21 ± 0.02 mm; FL, 0.72 ± 0.08 mm; LHL, 0.61 ± 0.08 mm; PW, 0.83 ± 0.06 mm; WL, 1.17 ± 0.09 mm; WGL, 3.52 ± 0.52 mm; ES, 5.54 ± 1.04 mm; SI, 91.8 ± 5.56; CI, 106 ± 3.18.