Body length, in mm | Flight Season - Month | Head, cheek, maximum width relative to eye | Head, cheek, position of widest point in profile | Head, clypeus and parocular areas, color of integument | Head, facial quadrangle | Head, mandible, length when mandibles closed | Head, vertex height | Initial inspection | Locality where specimen was collected in USA | Metasoma, tergum 2, pale apical hair bands | Metasoma, tergum 2, punctures - Primarily in the region from the base of the segment to the edge of the slightly depressed portion of the rim | Metasoma, tergum 2, surface texture in middle of tergum | Region where specimen was collected | Subgenus - for Andrena experts only | This guide is UNDER CONSTRUCTION | Thorax, pronotum humeral angle | Thorax, propodeal triangle, percentage of LENGTH, measured from base, coarsely sculptured | Wings, forewing, number of submarginal cells

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Number scored for a state is in green.

1. This guide is UNDER CONSTRUCTION

1201. Click here to key bees from east of the Mississippi - excludes western species and those rare and potentially invalid species we have not seen    1292. Click here to include all eastern species and exclude all western species    4473. Click here to include all species except those rare and potentially invalid species we have not seen - note that many western species have not been completely scored so the guide may not resolve them    5184. Click here to keep all species in the key - note that many western species haven t been completely scored so the guide is unlikely to resolve many species   

2. Initial inspection    [Explain]

5171. Normal MALE    12. Normal FEMALE    13. UNCOMMON: Stylopized   

3. Region where specimen was collected

4771. United States    1642. Canada    2183. Mexico    74. South of Mexico    520Zz Do not show this character again   

4. Locality where specimen was collected in USA    [Explain]

15AK    53AL    59AR    149AZ    262CA    154CO    90CT    99DC    100DE    27FL    89GA    87IA    129ID    106IL    102IN    92KS    96KY    37LA    90MA    101MD    73ME    92MI    82MN    97MO    46MS    115MT    97NC    74ND    118NE    76NH    107NJ    147NM    167NV    99NY    99OH    74OK    140OR    108PA    90RI    90SC    103SD    93TN    118TX    142UT    100VA    76VT    124WA    91WI    103WV    147WY    520Zz Do not show this character again   

5. Flight Season - Month

501. January    1762. February    3053. March    3564. April    3755. May    3266. June    2997. July    2268. August    1529. September    9910. October    5411. November    1812. December   

6. Body length, in mm    [Explain]

53    304    975    2226    3417    4098    4129    38310    29211    19112    11213    5814    1715    416    117    520Zz Do not show this character again   

7. Head, clypeus and parocular areas, color of integument

315Both entirely dark    92Both with at least some yellow    37Clypeus with at least some metallic reflections    124Clypeus with at least some yellow, parocular areas dark    4UNCOMMON: Clypeus dark, parocular areas with at least some yellow   

8. Head, vertex height

1471. Less than 1 ocellar diameter    2142. About 1 ocellar diameter    2043. More than 1 to 1.5 ocellar diameters    1034. More than 1.5 to 2 ocellar diameters    415. Two or more ocellar diameters   






9. Head, facial quadrangle    [Explain]

1911. BROADER than long    2042. QUADRATE, about as broad as long    1663. LONGER than broad   




10. Head, cheek, maximum width relative to eye    [Explain]

961. As broad as eye or slightly narrower    1143. From 1 to 1.25 times as broad as eye    1064. From 1.25 to 1.5 times as broad as eye    1055. From 1.5 to 1.75 times as broad as eye    596. From 1.75 to 2 times as broad as eye    277. About twice as broad as eye    128. More than twice as broad as eye   








11. Head, cheek, position of widest point in profile

181. Below middle of eye    812. Near middle of eye    1843. Above middle of eye   




12. Head, mandible, length when mandibles closed

63Long, distinctly decussate, forming an clear X, tips exceed clypeus midline by more than 1/3 mandible length    94Moderate, somewhat decussate but not forming a clear X, tips exceed clypeus midline by 1/4 to 1/3 mandible length    146Short, female-like, only one tip visible when mandibles closed   




13. Thorax, pronotum humeral angle

102ABSENT, rear edge of pronotum smoothly rounded    83Present, but WEAK, with rounded angle but not distinct corners    69Present, distinctly squared off forming CORNERS   




14. Thorax, propodeal triangle, percentage of LENGTH, measured from base, coarsely sculptured    [Explain]

440 percent - triangle uniformly smooth    1035 - 50 percent    6350 - 80 percent    48100 percent - triangle completely filled   

15. Wings, forewing, number of submarginal cells

1402    4723   



16. Metasoma, tergum 2, pale apical hair bands

861. Complete, not interrupted medially    1782. Narrowly interrupted medially, no more than half of apical margin bare    2263. Broadly interrupted, more than half of apical margin bare    2514. Absent, hair on apical margin not denser than elsewhere   

17. Metasoma, tergum 2, punctures - Primarily in the region from the base of the segment to the edge of the slightly depressed portion of the rim

87Absent or indistinct and difficult to see even at high magnification    52Dense, separated by less than 1 puncture width    52Separated by 1-3 puncture widths    29Separated by 3-6 puncture widths    13Sparse, separated by more than 6 puncture widths   

18. Metasoma, tergum 2, surface texture in middle of tergum

263GRANULAR or with fine lines, usually dull but may still be somewhat shiny    157SMOOTH and SHINY   

19. Subgenus - for Andrena experts only    [Explain]

2Anchandrena    45Andrena s.str.    2Aporandrena    3Archiandrena    3Augandrena    6Belandrena    91Callandrena    1Celetandrena    1Charitandrena    1Chaulandrena    28Cnemidandrena    2Conandrena    1Cremnandrena    4Dactylandrena    3Dasyandrena    10Derandrena    25Diandrena    1Erandrena    25Euandrena    1Geissandrena    2Genyandrena    7Gonandrena    9Hesperandrena    7Holandrena    1Iomelissa    1Larandrena    12Leucandrena    30Melandrena    21Micrandrena    3Nemandrena    2Notandrena    3Oligandrena    22Onagrandrena    1Opandrena    1Oxyandrena    10Parandrena    1Pelicandrena    7Plastandrena    2Psammandrena    3Ptilandrena    4Rhacandrena    2Rhaphandrena    24Scaphandrena    2Scoliandrena    19Scrapteropsis    11Simandrena    1Taeniandrena    18Thysandrena    25Trachandrena    15Tylandrena    1Xiphandrena    32ZUnassigned    518Zz Do not show this character again