Genus 1. FORMICA ^HNS.

Formica ^HNS, pt., Linn. Faun. Suec. 426 (1761); Syst. Nat. i. 962 (1766).

Lasius ^HNS, pt., Fabr. Syst. Piez. 415 (1804).

Cataglyphis ^HNS, Foerst. Hym. Stud. Form. 485 (1850).

Tapinoma ^HNS, pt., Schenck, Besch. Nass. Ameis. 129 (1852).

Monocombus ^HNS,.Mayr. 110 (1855).

The maxillary palpi 6-jointed; the labial palpi 4-jointed. Ocelli 3, placed in a triangle on the vertex*. Males and females winged, constantly so in the former sex, temporarily so in the latter. The superior wings with one marginal and two submarginal cells; one division having also a complete discoidal cell, another in which it is obsolete; the petiole of the abdomen furnished with a single vertical scale. None of the individuals furnished with a sting. The pupae enclosed in silken cocoons.

* In a few species these are obliterated, or scarcely discernible, as in the small workers of F. flava and F. nigra, &c.