. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 74 Bulletin Museum of Comparative Zoology, Vol. 151, No. 2. Figures 21-22. Acanthomyrmex dusun holotype (major worker). 21. Frontal view of head. 22. Dorsal-lateral view of trunk. Scale lines. mm. more pilosity than in workers, but other- wise pilosity similar to workers. Male. Measurements of five specimens from southern KaHmantan (male from Peninsular Malaysia very similar): HW to , HL to (CI 123 to 128), ML to (Ml 56 to 64), SL to (SI 57 to 61), EL to mm. Head (
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 74 Bulletin Museum of Comparative Zoology, Vol. 151, No. 2. Figures 21-22. Acanthomyrmex dusun holotype (major worker). 21. Frontal view of head. 22. Dorsal-lateral view of trunk. Scale lines. mm. more pilosity than in workers, but other- wise pilosity similar to workers. Male. Measurements of five specimens from southern KaHmantan (male from Peninsular Malaysia very similar): HW to , HL to (CI 123 to 128), ML to (Ml 56 to 64), SL to (SI 57 to 61), EL to mm. Head (Fig. 6) broad, widest imme- diately above eyes; vertex broad, posterior margin of head feebly concave. Head sculptured as in minor workers but less regular and much more feeble; pilosity long, rising mm dorsally. Clypeus ir- regularly longitudinally rugose, forward margin lacks projecting lobes. Trunk (Fig. 7) as described for queen, but propodeal spines lacking; feebly and irregularly ru- gose dorsally with only traces of foveate sculpture. Both petiole and postpetiole with low, rounded nodes; postpetiole somewhat longer than wide in dorsal view. Jet black, with legs and gaster dark brown and mandibles dark yellowish orange. Additional Records. MALAYSIA: Pen- insular Malaysia: Selangor, Ulu Gombak Forest Reserve: 15 Feb. 1983, one minor worker (H. T. Imai, MCZ); 16 Feb. 1983, one minor worker (M. Kubota, MCZ); 7/10/1973, seven minors, one major, one dealate queen (B. Bolton, BMNH and MCZ); Universiti Malaya Field Studies Center, ca. 260 m, rainforest, no. H-385, 2 Aug. 1967, three minor workers (R. Cro- zier, MCZ). Kepong, Selangor, Forest Re- search Institute, 3 Feb. 1983, one minor worker (M. Kubota, MCZ); Pahang, below The Gap, ca. 850 m, hill forest, 17 Aug. 1967, two minor workers (R. Crozier, MCZ, BMNH); Perak, Ringlet Pass, 28 Feb. 1982, one minor worker (M. Kubota, MCZ). Sarawak: 4th Div., Gunung Mulu National Park, Kerangas, BMNH 1978-49, , three minor
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