Labellorrhina quantula sp. n.

Material studied. Holotype male: BRUNEI, Ladan Forest Res., logged forest, Malaise trap, XII.1992 – II.1993, M. J. Sahat (MZH). Paratypes: same data as holotype, 9 ♂, same data but ‘primary forest’, 3 ♂ (MZH, NMWC and NRM).

MALE. Head. Fig. 2 A. Flagellomere 4, Fig. 4 B. Thorax. Fig. 5 A. Anterior pronotum with 5–8 setae. Episternum 1 with 3–4 setae. Laterotergite with 1–4 setae. Legs. Fig. 5 A–C. Femur 1 and 2 slender with straight or concave dorsal and ventral margins, about one half of thickness of femur 3. Tibia 3 with a transverse subapical retrolateral row of 8 – 10 strong setae. Length of basitarsomere 1/length of tibia 1 0.58–0.65. Wing. Fig. 8 C. Wing length 0.98–1.06 mm. Haltere pale. Abdomen. Hypopygium, Fig. 9 A and B.

Discussion. For the distinguishing characters between L. quantula and L. grimaldii, see under the latter.