E. hamata vs all, hind tibial spur, shape - Look closely 2 | Female - E. atriventris vs E. rosae - Species with dark scopa - Combination of characters | Female, abdomen, color of hair | Female, hind leg, color of scopal hairs | Male - E. atriventris, E. dubitata, E. rosae - Very similar species - Combination of characters | Male, abdomen, T3 and T4, color and pattern of hair | Male, fore wing, point where the 1st recurrent vein meets the 2nd submarginal cell | Male, head, labrum, color | Male, thorax, scutum, color of hair | Sex, number of antennal segments | State or province where bee was collected

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Number scored for a state is in green.

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

10AL    2CT    8DC    8DE    10FL    10GA    11IL    11IN    11KY    2MA    8MD    2ME    10MI    10MS    10NC    2NH    8NJ    6NY    10OH    8Ontario    8PA    2RI    10SC    2SD    8TN    10VA    2VT    11WI    8WV   

2. Sex, number of antennal segments

6Female, 12    7Male, 13   



3. E. hamata vs all, hind tibial spur, shape - Look closely 2

11All others - NOT hooked, may be gently curved toward the tip    2E. hamata - HOOKED dramatically at tip, but only at tip, the angle of the hook is about 90 degrees, otherwise the spur is straight   



4. Female, hind leg, color of scopal hairs

2Dark    3Off-white    3Orange   




5. Female, abdomen, color of hair

3All dark except light hair on the base of T1, no distinct hair bands    3Light on T1, T2-T5 with STRONG apical or submedian bands of light hair, dark hair basally and or on the central disc region    1Nearly completely covered in bright yellow-orange hair, no distinct hair bands   




6. Male, thorax, scutum, color of hair

1Light to bright orange    7Off-white to yellow   



7. Male, abdomen, T3 and T4, color and pattern of hair

3Dark across the entire base of the segments, narrow white to off-white hair band located along the base of the slightly depressed apical margins    1Dark basally, though this dark area often retracted or hidden by the rim of the preceding segment, wide swath of short off-white to white hair covering part of disc and most of the depressed apical margin, hairs on the very edge of the rim may be dark    1Golden orange basally, golden orange to off-white hair bands apically    4Sparse dark hair, no hair bands   





8. Male, fore wing, point where the 1st recurrent vein meets the 2nd submarginal cell

2About 2/3 the way across the cell    5About 3/4 the way or more across the cell   



9. Female - E. atriventris vs E. rosae - Species with dark scopa - Combination of characters

1E. atriventris - Wide depressed rim of T2 with pits present throughout, usually with a SLIGHTLY lower density in the center and only a NARROW unpitted section right along the rim - The distance between the eye and the intersection of the edge of the mandible and the clypeus wider that the widest part of the scape - FAR sides of labrum with an unpitted slightly raised area, the unpitted area easily 5 or more pit diameters wide    2E. rosae - Wide depressed rim of T2 with pits largely restricted to the base of the depressed area in the center of the segment, if pits are present in the middle of the central area then they are scattered, at very low density, and leaving a very wide unpitted rim - The distance between the eye and the intersection of the edge of the mandible and the clypeus slightly narrower than the widest part of the scape - FAR sides of labrum with no slightly raised area, pits extending uniformly across entire labrum, at times there might be some vaguely less pitted area on the far side, but it would at most be 2-3 pit diameters wide   

10. Male - E. atriventris, E. dubitata, E. rosae - Very similar species - Combination of characters

1E. atriventris - Told from E. dubitata and E. rosae by the following characteristics, SOME OF WHICH MAY NOT BE PRESENT ON ALL SPECIMENS, so use a weight of evidence approach - Labrum with a narrow strip of black around the rim of the labrum, most obvious on the sides - Upperside of clypeus often edged with black - Gap between the clypeus and the eye about two quarters to three quarters the width of the flagellum - S6 with either no raised line on the segment at all, or 2 vague raised lines that runs about one quarter of the way latitudinally across the segment from the sides - The shortest side of F1 clearly longer than the width of the base of the segment    2E. dubitata and E. rosae - These 2 are told apart in a separate character. Both appear to be discernable from E. atriventris by the following characteristics, SOME OF WHICH MAY NOT BE PRESENT ON ALL SPECIMENS, so use a weight of evidence approach - Labrum with no black present, entirely yellow - Clypeus entirely yellow - Gap between the clypeus and the eye clearly less than one half the width of the flagellum - S6 with 2 short, clearly and prominently raised lines or ridges, the raised nature of these lines clearly visible when looking at them from the side, each about one quarter the width of the segment, these lines run parallel to the sides of the S6 but are set back from the rim, Timberlake suggests that only E. dubitata has these lines, but so far all the identified E. rosaea in the collection have lines too - The shortest side of F1 about as long as the width of the base of the segment   

11. Male, head, labrum, color

1Dark, possibly with small yellow spot in center    5Entirely yellow    2Yellow with narrow dark rim