Abdomen, T6, Surface features | Head, clypeus, color | Head, hypostomal carina | Head, preoccipital ridge or carina | Note - This guide is usable but incomplete, if your specimen is from eastern North America use the Ceratina guide which has no sex associated with it | State or province where bee was collected | Subgenus | Thorax, mesepisternum, pitting | Thorax, pronotal lobe, color

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Number scored for a state is in green.

1. Note - This guide is usable but incomplete, if your specimen is from eastern North America use the Ceratina guide which has no sex associated with it

1Admin only    1Admin only 2   

2. State or province where bee was collected

3AL    1AR    7AZ    3British Columbia    13CA    4CO    3CT    3DC    3DE    4FL    4GA    3IA    5ID    3IL    3IN    3KS    3KY    3LA    3MA    3MD    2ME    3MI    2MN    3MO    4MS    2MT    2Manitoba    4NC    2ND    2NE    2NH    3NJ    6NM    6NV    3NY    2New Brunswick    1Northwest Territories    2Nova Scotia    3OH    3OK    7OR    2Ontario    3PA    2Quebec    3RI    4SC    2SD    3TN    13TX    6UT    3VA    2VT    4WA    3WI    3WV    3WY   

3. Head, clypeus, color

5Clypeus entirely dark    21Having an ivory mark or stripe   

4. Thorax, pronotal lobe, color

5Entirely dark    19Ivory marking obvious and apparent    4Ivory marking reduced to a small almost unnoticed spot   

5. Head, hypostomal carina

16Anterior end smoothly curved toward the base of the mandibles and the height of the carina the same height throughout    10Anterior end toothed, or right angled   

6. Head, preoccipital ridge or carina

18Absent, no ridge, carina or sharp line demarking the back of the head just a smooth rounded surface    9Present, but the transition NOT with a dramatically raised above the surface of the head flange, instead it appears as a sharp, abrupt transition between the surface of the head and the underside, the underside often noticeably flat for a short ways after the transition, at times there is a low insignificant ridge or noticeable line along the boundary   

7. Thorax, mesepisternum, pitting    [Explain]

17Pitting dense, pits spaced less than a pit apart    8Pitting sparse, pits spaced more than a pit apart   

8. Abdomen, T6, Surface features

1A Longitudinal line or very narrow ridge runs down the center of nearly the tip, this ridge can often be a bit vague, often rugged and not smooth, but clearly different from the surrounding surface sculpturing and usually becomes most prominent towards the tip of the abdomen    2A small tuft of hair filling a centrally located depression in the middle of the middle of the segment, this hair is best seen from the lateral profile    20Surface with only a small shallow central depressed area or none at all, no longitudinal ridge, and no tufts of hair, when the lateral profile is viewed the slope is uniform and smooth    5With a small central depression but not one filled with hair, looking at the segment from the side this central depressions causes the profile of the segment to have a rounded or angular notch in the surface of T6   

9. Subgenus

1Calloceratina    2Ceratinula    1Euceratina    18Zadontomerus