Found several nests today in Edgewood Park (Redwood City, CA). My guess is Camponotus clarithorax, as they look more "golden" than the anthrax did.
http://www.antweb.org/description.do?rank=species&name=clarithorax&genus=camponotus&project=calants
These are very nice ants but i can not say for sure they are clarithorax.
I'm you compare them with the one on the picture of antweb, they look the same. ;)
very nice ants :) is the 2nd one a soldier? dont know much about these ants, but it looks very formidable lol
I think the second one has to be. It was huge. Although, several of the other ones where lurching at me when I tried to scoop them up. They were standing their ground. :-D
They could be C. clarithorax, it is a widespread and variable ant. The second one is indeed a major worker[I]