Strumigenys ornata

Identification
Bolton (2000) - A member of the Strumigenys ornata-group. The remarkable form of the clypeal pilosity renders this species unmistakable. The distribution of specialised clypeal hairs is duplicated in Strumigenys dietrichi but in that species they are not bulbous apically nor strongly recurved, and the clypeus is bluntly pointed anteriorly.

Distribution based on Regional Taxon Lists
Nearctic Region: United States.



Nomenclature

 *  ornata. Strumigenys ornata Mayr, 1887: 571 (footnote) (w.) U.S.A. Brown, 1953g: 66 (q.). Combination in S. (Cephaloxys): Emery, 1924d: 325; in S. (Trichoscapa): Smith, M.R., 1947f: 587; Creighton, 1950a: 308; in Smithistruma: Smith, M.R., 1951a: 828; Brown, 1953g: 65; in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 125. See also: Bolton, 2000: 113.

Worker
Bolton (2000) - TL 2.0-2.2, HL 0.54-0.60, HW 0.35-0.38, CI 63-66, ML 0.06-0.08, MI 11-14, SL 0.26-0.30, SI 70-80, PW 0.23-0.26, AL 0.50-0.58 (20 measured).

Fully closed mandibles with a gap between basal tooth and anterior clypeal margin that is equal to or longer than the length of the basal tooth. In full-face view clypeus with a short transverse to feebly convex anterior margin; hair at anterolateral clypeal angle, above mandible, curved strongly away from the midline and bulbous apically. Two stout hairs proj ect from lateral clypeal margin on each side, bulbous apically and shallowly curved posteriorly. In anterior view clypeus with an apicodorsal series of 4-6 stout standing long hairs that radiate from the dorsal apex like the ribs of a fan, these hairs strongly bulbous at their apices and in profile strongly curved posteriorly. In profile clypeal dorsum with a pair of very long wire-like hairs that arise at about the midlength; each of these hairs is inclined posteriorly from just above its base, then curves smoothly upwards so that at least the apical half of the shaft is directed vertically or nearly so. Dorsolateral margin of head with 2 long flagellate hairs, one in apicoscrobal position the other anterior to this, above the eye; distribution of flagellate hairs otherwise as in Strumigenys cloydi.

Type Material
Bolton (2000) - Syntype workers, U.S.A. District of Columbia, Washington (Pergande) [examined].