Country | Female, hind leg, tibial spur | Head, mandible, color | Male, hind leg, basitarsus, projection at apex | Sex, number of antennal segments | State or province where bee was collected | Subgenus | This guide is UNDER CONSTRUCTION

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Number scored for a state is in green.

1. This guide is UNDER CONSTRUCTION

41Click here to keep all species in the key - Note that many species have not been completely scored so the guide is unlikely to resolve many species    26Click here to key bees from the northwestern Chihuahuan Desert in northern Mexico and southwestern United States   

2. Country    [Explain]

4Canada    2Chile    2Colombia    5Costa Rica    1Ecuador    4El Salvador    4Guatemala    4Honduras    37Mexico    1Paraguay    1Peru    40United States    2Venezuela   

3. State or province where bee was collected

4Alberta    30Arizona    25Baja California Norte    2Baja California Sur    2British Columbia    32California    26Chihuahua    24Coahuila    12Colorado    16Durango    4Guanajuato    4Hidalgo    7Idaho    7Jalisco    7Kansas    1Louisiana    2Mexico    4Montana    1Morelos    26NW Chihuahuan Desert    8Nebraska    22Nevada    29New Mexico    4North Dakota    8Nuevo Leon    3Oaxaca    7Oklahoma    9Oregon    10Puebla    4Queretaro    6San Luis Potosi    27Sonora    6South Dakota    11Tamaulipas    22Texas    17Utah    7Washington    9Wyoming    4Zacatecas   

4. Sex, number of antennal segments

1412, female    1513, male   

5. Head, mandible, color

23Dark at base    4Yellow or pale at base   

6. Female, hind leg, tibial spur

10Slightly curved    10Straight at apex    4Strongly curved at apex   

7. Male, hind leg, basitarsus, projection at apex

2Greatly enlarged, comma-shaped, extending to the apex of the following tarsal segment or further    1Greatly enlarged, comma-shaped, not extending beyond the following tarsal segment    1Greatly enlarged, spherical    8Small and not conspicuously developed   

8. Subgenus

35Coquillettapis    4Dasiapis    2Diadasia