186 . Formica herculanea ^HNS. B.M.

Formica herculanea ^HNS, Linn. Faun. Suec. 1720.

Formica castanea, Latr. ^HNS Hist. Nat. Fourm. 118. pl. III. f. 12. A. [[worker]], D.[[queen]],C.[[male]].

St. Farg. Hym. i. 215. 21.

Hab. North America.

The F. castanea ^HNS appears to be the highly coloured form of F. herculanea; specimens from the United States are frequently highly coloured, some having the basal segment of the abdomen red; those from Arctic America are usually very dark coloured.