Abdomen, upper side, color pattern | Forewing, 1st intercubital vein | Head, mandible, shape | Hind legs, scopa, hair type - If filled with pollen usually impossible to determine | State or province where bee was collected | Subgenus | Thorax, upper and side surfaces, color pattern | Wings, color of veins

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Number scored for a state is in green.

1. State or province where bee was collected    [Explain]

16AL    5CT    7DC    17DE    22FL    18GA    12IL    12IN    5KY    7MA    17MD    2ME    11MI    16MS    18NC    1NH    17NJ    11NY    1New Brunswick    1Nova Scotia    8OH    8Ontario    9PA    1Prince Edward Island    2Quebec    3RI    18SC    5TN    17VA    1VT    12WI    5WV   

2. Thorax, upper and side surfaces, color pattern    [Explain]

2All pale, may have a few dark markings    2Dark with pale marking on pronotal lobe only    15Dark with pale markings on pronotum AND pronotal lobes    9Dark with pale markings on pronotum only    1Dark with pale markings on pronotum, pronotal lobe, and side surfaces    7Entirely dark with NO markings   

3. Abdomen, upper side, color pattern    [Explain]

13Dark with light colored PATCHES on the sides of two or more segments    5Dark with light colored bands that are BROAD and COMPLETE, extending across the entire middle of two or more segments    15Dark with light colored bands that extend across two or more segments, but are briefly INTERRUPTED in the center    9Dark, NO markings or with only 2 small patches on only one segment    3Pale yellow to reddish   

4. Wings, color of veins

17Clear to milky white or pale yellow with a light coloured stigma - stigma sometimes with dark edges    16Light to dark brown    1Pale yellow with a conspicuously dark stigma   

5. Forewing, 1st intercubital vein

6Branched, forming a triangular additional cell at its base that can range from large and conspicuous to minute and visible only under high magnification    22Simple, no branching, nor any additional tiny cell   

6. Head, mandible, shape

24Normal, tip NOT flexed relative to base, may be gently curved toward head    2Tip flexed toward the head at nearly a right angle relative to base   

7. Hind legs, scopa, hair type - If filled with pollen usually impossible to determine    [Explain]

18At least half of scopal hairs are SIMPLE, ABSOLUTELY unbranched - Some branched hairs usually present along sides and near base - Careful, branches can be minute and scale-like, very easy to mistake as simple    9Hairs are mostly BRANCHED, these branches are MINUTE and short, often scale-like, usually set at an acute angle to the mainstem regularly spaced throughout the last two-thirds of the hair, and visible only at high magnification, hairs along the edges with slightly longer branches which often lead to the mistake that the remaining hairs are without branches    2Hairs are relatively longer and more abundant than other species and clearly WAVY rather than straight   

8. Subgenus

6Alloperdita    2Cockerellia    8Hexaperdita    11Perdita