Strumigenys lacunosa

Identification
See notes under Strumigenys dipsas.

Distribution based on Regional Taxon Lists
Oriental Region: Taiwan. Palaearctic Region: Japan.

Nomenclature

 *  lacunosa. Strumigenys lacunosa Lin & Wu, 1996: 146, figs. 5, 11, 20-24 (w.q.) TAIWAN. See also: Bolton, 2000: 759.

Worker
TL 3.1, HL 0.78, HW 0.57, CI 73, ML 0.39, MI 50, SL 0.43, SI 75, PW 0.33, AL 0.84. Mandible with a preapical tooth, reduced to a large denticle in some individuals. Dorsolateral margin of head in full-face view with 3 freely laterally projecting flagellate hairs: one just posterior to level of eye, one in apicoscrobal position, one posterior to this on dorsolateral margin of occipital lobe. Cephalic dorsum with a transverse row of 4-6 erect fine hairs along occipital margin but without erect hairs anterior to this. Dorsum of head weakly finely reticulate-rugulose and densely reticulate-punctate. Apical funicular segment moderately constricted basally. Pronotal dorsum sharply punctate, side of pronotum less regularly sculptured. Pleurae and side of propodeum mostly smooth, some sculpture present above level of propodeal spiracle. Pronotal humeral hair flagellate and very long. Dorsum of pronotum with at least 2 pairs of erect flagellate hairs, and about 4 pairs present on mesonotum. First gastral tergite with numerous long fine flagellate hairs. Dorsal and ventral surfaces of hind femur with spaced rows of standing hairs; dorsal (outer) surfaces of hind tibia and basitarsus each with long erect freely projecting filiform or flagellate hairs. Propodeal teeth acute, in profile short-triangular and broad basally. Petiole in profile claviform, the lateral spongiform lobe large; in dorsal view the lateral spongiform lobes extend forward to level of anterior face of node where node grades into peduncle.

Type Material
Holotype worker, paratype workers and queen, TAIWAN: Taipei Hsien, Chuchih, 26.v.1988 (C. -C. Lin); paratype workers and queens, TAIWAN: Nantou Hsien, Chitou, 29.xi.1992 (C. -C. Lin); Lienhuachih, 31.x.1988 (Y. C. Shiau); Taitung Hsien, Lichia, 29.iii.1995 (C. -C. Lin) [examined].