Formica obscuripes [Thatch ant]
Photograph © Alex Wild
USA, CA, Nevada Co.: Sagehen Creek Field Station.
13.vii.2004, 39Âº26'N 120Âº14'W, 1920m
Lodgepole Pine forest/wet meadow.
#AW2425, voucher specimens deposited at ALWC and MHNG.
"Worker polymorphism in the mound ant Formica obscuripes. These ants are sisters from the same nest."
Used by permission, from http://myrmecos.net, Wild's website.