Abdomen, T1 and T2, color | Female, abdomen, T5, shape of apical end | Females, abdomen, S6 | Females, mandibles | Head, Paraocular region | Head, clypeus, color | Males, abdomen, S6 | Sex, number of antennal segments | State or province where bee was collected in U.S. or Canada | The opening page offers a limited set of characters from which to choose. Click on any trait states that you can confidently assess, and then use the SEARCH button to activate your choices. This will return a set of species matches on the left . Next, select SIMPLIFY and the screen will present a new set of characters. | Thorax, mesepisternum - mesopleuron | Thorax, scutellum

Check boxes for all that apply. If uncertain, skip character or select several states. Then click on any search button.
Navigate with above index or scroll bar.
Number scored for a state is in green.
1. The opening page offers a limited set of characters from which to choose. Click on any trait states that you can confidently assess, and then use the SEARCH button to activate your choices. This will return a set of species matches on the left . Next, select SIMPLIFY and the screen will present a new set of characters.    [Explain]

1DO NOT CLICK THIS BUTTON -- Please click on the EXPLAIN button for a link to a guide to using Discover Life. A link to a Google Drive folder with additional keys and other identification resources is also provided.   

2. State or province where bee was collected in U.S. or Canada    [Explain]

4AL    6AR    10AZ    2BC    4CA    4CO    2CT    2DC    2DE    6FL    4GA    4IA    2ID    4IL    4IN    2KY    6LA    2MA    2MD    2MI    4MN    6MO    4MS    16Mexico    4NC    4NE    2NJ    4NM    4NV    2NW Chihuahuan Desert    2NY    4OH    2OK    2OR    2PA    2RI    4SC    2SD    2TN    2TX    4UT    2VA    2WV   
3. Sex, number of antennal segments

1312, female    1313, male   


4. Head, clypeus, color

11Entirely black    15Entirely yellow or red, or with black only in part   


5. Head, Paraocular region

2RED maculation extra long, ending near top of compound eye    1RED maculation long, ending above antennal sutures but no where near the top of the compound eye    2Yellow maculation long, ending above antennal sutures    14Yellow maculation short, ending at antennal sutures    6Yellow maculations shortER, ending below antennal sutures   
6. Abdomen, T1 and T2, color

6All BLACK    2Black with RED complete stripes    17Black with YELLOW markings   



7. Female, abdomen, T5, shape of apical end

11Median extension 1/2 as wide as segment width, shallowly concave NOT forming two strong angles medially but WITH two lateral angles    1Median extension 1/3 as wide as segment width, deeply angled inward forming two strong projecting angles medially   
8. Females, abdomen, S6

10Last sternite apically only covered with very short scopal hairs WITHOUT spine-like projections   
9. Thorax, mesepisternum - mesopleuron

3The upper part of the carinate omaulus is CONCAVE, the omaulus is the angle between the anterior and lateral surface of the mesepisternum or mesopleuron    15The upper part of the carinate omaulus is STRAIGHT, the omaulus is the angle between the anterior and lateral surface of the mesepisternum or mesopleuron   
10. Females, mandibles

10With 4 clear teeth   
11. Males, abdomen, S6

12WITHOUT spine-like projection   
12. Thorax, scutellum

20With ROUNDED posterolateral angles