Macrotermes annandalei (Silvestri, 1914)

Macrotermes annandalei (Silvestri, 1914) View in CoL

Synonymy: Termes annandalei Silvestri, 1914 .

Material examined: The specimens of M. annandalei were collected from the dry evergreen forest at Kaeng Krachan National Park in Phetchaburi province and the deciduous dipterocarp forest at Phu Toei National Park in Suphan Buri province and at Khun Chae National Park in Chiang Rai province. Sixty soldier termites (i.e., major soldier 30 samples and minor soldier 30 samples) were used for describing.

Major soldier case: horax, legs, and abdomen brown ( Fig. 1D View Fig ). Head: reddish brown, margins slightly darker, a few scattered hairs, head capsule sub rectangular, slightly narrowed anteriorly, slightly less than 1.5-fold long as broad at the widest point; labrum brown; hyaline tip triangular, not elongated or sharp at the tip, length of head to side base of mandibles with 4.78 mm to 5.05 mm, width of head at side base of mandibles with 2.48 mm to 2.61 mm. Antennae; 17 segments, the third segment slightly less than twice as long as the second, the fourth segments shorter than the third and slightly longer than the second. Mandibles; dark brown, stoutly built, thick, tips curved, left mandible with a few distinct crenulations at the base, right mandible without crenulations, length of left mandible with 2.44 mm to 2.60 mm. Labrum brown; mandibles dark brown, bases slightly lighter, long hairs along the lateral sides. Pronotum; brownish, convex both anteriorly and posteriorly and concave in the middles of both margins, lateral lobes narrowly rounded; lateral margins of the mesonotum and metanotum somewhat angular, sparsely hairy, pronotum length with 1.35 mm to 1.98 mm; pronotum width with 2.65 mm to 2.86 mm. Postmentum; elongated or nearparallel-sided in the middle with two hairs near the tip, lateral margins near the posterior end slightly convex.

Minor soldier case: thorax, legs, and abdomen brown ( Fig. 1E View Fig ). Head; reddish brown, scantily hairy, head capsule subrectangular, 1.5-fold as long as broad, broadest in the middle, length of head to side base of mandibles with 2.96 mm to 3.12 mm, width of head at side base of mandibles with 1.40 mm to 1.50 mm. Antennae with 17 segments; the third segment about 1.5-fold as long as the second and slightly longer than the fourth and fifth segment, and fourth which were subequal. Mandibles; reddish brown or dark brown, stoutly built, relatively slender, tips slightly curved, left and right mandibles without crenulations, length of left mandible with 1.82 mm to 1.92 mm. Labrum; more extended than broad, the lateral margins weakly convex, the tip triangular, the hyaline tip triangular, not elongated or sharpened at the tip, a few long hairs along the lateral sides. Pronotum; brownish, sparsely hairy, mesonotum and metanotum slightly lighter than the pronotum, indistinctly notched anteriorly in the middle over half the width, the posterior margin emarginate, the lateral lobes narrowly rounded, pronotum length with 0.98 mm to 1.06 mm, pronotum width with 1.71 mm to 1.87 mm. Postmentum; arched with a pair of hairs along each anterolateral margin, lateral margins almost parallel.

Distribution: China, Malaysia, Myanmar, Vietnam, Thailand.