
Appearance
The California carpenter bee is all black, as other ''Xylocopa'' species−the large carpenter bees are, and has some bluish/greenish reflections. The male has some lighter markings on the pronotum and the abdominal segments.
Naming
The species has three named subspecies:⤷ ''Xylocopa californica arizonensis'' Cresson, 1879
⤷ ''Xylocopa californica californica'' Cresson, 1864
⤷ ''Xylocopa californica diamesa'' Hurd, 1954

Distribution
''Xylocopa californica'' is found in California, Nevada, Oregon, Utah, Arizona, and Northwestern Mexico. It is found, along with ''Xylocopa varipuncta'', in the Central Valley and in Southern California, including the Mojave Desert. They are agriculturally beneficial insects and pollinators of diverse California chaparral and woodlands and desert native plant species.References:
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