Megastigmus aculeatus

Female: body length (without ovipositor) 3.4 mm, range 2.6–4.0 mm; male body length 2.5–3.2 mm. Colour predominantly brownish yellow with brown to black markings. Head light brownish yellow except ocelli and occipital carina partly surrounded with black; pilosity pale on lower face, black on remainder of head. Antennal scape much longer (about 1.8×) than pedicel, anellus and first funicular segment combined; funicular segments in male about 1.8× as long as broad. Pronotum and mid-lobe of mesoscutum with coarse cross-striation. Scutellum 1.1–1.2× as long as broad, with coarse, arcuate cross-striae on anterior part, frenal area nearly smooth with a few weak longitudinal furrows on sides. Forewing stigma roughly oval, less than 1.5× as long as broad; upper part of stigmal vein comparatively short, smaller than one-third of stigma length; no infuscation around stigma. Thorax mostly brown except anterior part of pronotum light brown, posterior part of mid-lobe of mesoscutum, scutellum and dorsellum orange-yellow. Lateral parts of thorax light brownish except mesepisternum, mesepimeron and metapleuron dark brown. Legs light brownish except claws. Ovipositor sheaths 1.2× as long as body length. Distal end of dorsal valve of ovipositor bearing small cutting teeth, first median tooth lanceolate. Male aedeagus short and conical, digitus with three teeth.

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