Catalog Number: USNM
Collection: Smithsonian Institution, National Museum of Natural History, Department of Entomology
Locality: Cala.. Date:Not recorded, California, United States
- Lectotype: 1864. Proceedings of the Entomological Society of America. 2: 40.
California carpenter bee
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.  
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 (dorsal prothorax) and the abdominal segments. 
The species has three named subspecies:
- Xylocopa californica arizonensis Cresson, 1879
- Xylocopa californica californica Cresson, 1864
- Xylocopa californica diamesa Hurd, 1954
- "Xylocopa californica". Integrated Taxonomic Information System.
- National Audubon Society Field Guide to Insects and Spiders; Lorus and Margery Milne; 1980; Knopf.
- California Insects; Jerry A. Powell, Charles L. Hogue; 1989; University of California Press.
- Discoverlife.org: Xylocopa californica
- BugGuide.Net: Species − Xylocopa californica
- Discoverlife.org: Photo gallery of Xylocopa californica (Western Carpenter Bee) — with list of host plants.
- BugGuide.Net: Xylocopa californica — Western Carpenter Bee — images.
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