Abdomen, T6, center of segment covered in short, dense, appressed, light colored hair | Abdomen, T6, outline of prominent parallel median ridge | Abdomen, upper side, hair color and presence or absence of hair bands | Head, distance between lateral ocelli vs distance from lateral ocelli to the back edge of the head | Head, inner cheek, area adjacent to the hypostomal cavity, hair pattern | Legs, front basitarsi, shape | Legs, front coxae, spine | Legs, front tarsi, color | State or province where bee was collected | Subgenus

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Number scored for a state is in green.

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

35AL    20CT    30DC    30DE    37FL    35GA    31IL    30IN    28KY    19MA    30MD    18ME    23MI    35MS    36NC    17NH    31NJ    22NY    13New Brunswick    5Newfoundland and Labrador    12Nova Scotia    30OH    20Ontario    31PA    12Prince Edward Island    18Quebec    19RI    36SC    3SD    28TN    31VA    16VT    23WI    31WV   

2. Abdomen, T6, center of segment covered in short, dense, appressed, light colored hair    [Explain]

32No    13Yes   

3. Abdomen, upper side, hair color and presence or absence of hair bands    [Explain]

361. Most commonly occurring state - Majority of hair on tergites LIGHT - T2-T5 WITH latitudinal bands of dense hair along the apical rim or base of the segments, these bands may or may not go completely across the segment - There may or may not be some dark bristles laterally on the tergites    52. T1 or T1 and T2 with extensive, uniform LIGHT hairs - T3-T6 with upper surface covered with dark hair or dark and light hair intermixed - NO distinct hair bands    13. T1-T2 with DENSE, SHORT, yellowish ORANGE hair - T3-T5 WITH latitudinal light colored bands of hair along the rim -T6 with long, dark, sparse bristles    14. All hair LIGHT, NO distinct hair bands    25. All hair DARK, NO distinct hair bands   

4. Head, inner cheek, area adjacent to the hypostomal cavity, hair pattern    [Explain]

311. Thickness of hair growth gradually increasing from middle to inner cheek, or uniform throughout    142. Hair dramatically and abruptly thickened, WITH a distinct, though often very narrow, HAIRLESS FURROW leading from the hypostomal carina to the eye - note that there will be thick patches of hair to either side of the furrow    153. Hair dramatically and abruptly thickened in comparison to hair growth on middle cheek, LACKING a hairless furrow   




5. Legs, front coxae, spine    [Explain]

8Reduced to low bump-like tubercles, not elongated    36Well developed, at least somewhat elongated   



6. Legs, front basitarsi, shape    [Explain]

261. Unmodified, NOT dilated    112. Slightly dilated to roughly EQUAL the width of the tibia    153. Dilated to EXCEED the width of the tibia   




7. Legs, front tarsi, color

19Pale yellow    26Reddish brown   



8. Abdomen, T6, outline of prominent parallel median ridge    [Explain]

34Distinctly notched or dipped in center    12Highly irregular and jagged    13More or less rounded   




9. Head, distance between lateral ocelli vs distance from lateral ocelli to the back edge of the head    [Explain]

4Distance between lateral ocelli GREATER    41Distance between lateral ocelli LESS    13Equidistant   




10. Subgenus

1Acentron    2Argyropile    1Callomegachile    4Chelostomoides    3Eutricharaea    1Leptorachis    3Litomegachile    5Megachile    7Megachiloides    2Melanosarus    1Pseudocentron    2Pseudomegachile    4Sayapis    8Xanthosarus