Webb Canyon, ~2000 ft. elevation, Los Angeles County, California, USA
September 29, 2009
Size: ~6 mm
I rescued this wonderful beetle from the landlord's pool. After looking around, I feel fairly certain that this is a dryopid (Long-toed Water Beetle), but the family would be a new one for me and I would appreciate confirmation from more experienced coleopterists. The only other CA specimen currently in the guide for me to compare with is this fantastic series by Joyce Gross
showing a Postelichus
species. It looks pretty similar to mine, but I'm not familiar enough with this group to know how to rule out other genera...
Photographed on an oak leaf where I was letting it dry off. Surrounding habitat is chaparral and mixed oak woodland. There is a nearby seasonal creek, but it was dry at the time.