Aacanthocnema dobsoni

Description. Adult (Figs 19 – 25). Colour: Male: general colour pale cream to ochraceous with brown to dark brown markings. Vertex pale with a pair of dark brown longitudinal submedial stripes; genal processes pale merging to dark brown apices; antennal segments 1 – 2 ochraceous to brown; segment 3 darker apically; segments 4 – 10 dark brown to black; pronotum pale with a pair of dark brown to black broad longitudinal submedial markings; mesopraescutum with a pair of broad longitudinal brown to dark brown stripes, suffused anteriorly; mesoscutum with two pairs of brown to dark brown suffused longitudinal submedial stripes; mesoscutellum with brown medial suffusion; wings clear; legs with dorsal brown infuscation; fore- and mid-tarsi dark brown to black; hind basitarsi ochraceous, distal segment of hind tarsi dark brown to black; abdominal tergites dark brown to black; anterior face of proctiger pale laterally; subgenital plate ochraceous to brown; parameres with dark margins and apices; proximal segment of aedeagus brown, distal segment pale. Female: As for male, except with paler markings; vertex with dark infuscation on anterior margin and a pair of brown markings in vicinity of fovea; proctiger ochraceous merging to dark brown around circum-anal pore ring and at apex; subgenital plate with dark proximal brown infuscation. Structure: measurements and ratios as in Tables 1 – 5. Antennae short, 1.09 – 1.44 times width of head, genal processes elongate, 0.64 – 0.88 times length of vertex, conical, apices separated, little-divergent; anterior margin of vertex rounded from dorsal aspect, delineated from genal processes by prominent ridge; vertex with weak medial suture; pronotum with moderate anterior, medial node; thorax weakly arched, head wider than pronotum, and little wider than mesoscutum; fore wings short with broadly rounded apex; Rs short, mostly straight except distally, terminating well short of wing apex; vein M 1 + 2 terminating short of wing apex; cell m 1 short, broadly triangular; m 1 cell value 0.95 – 1.18; cell cu 1 short triangular; cu 1 cell value 1.10 – 1.40; radular areas thin, elongate in cells m 2 and cu 1, mostly absent in cell m 1 or if present restricted to a few spicules; male terminalia as in Figs 37 – 38; proctiger long, thin, without lateral expansions; parameres short, broad basally from lateral aspect, strongly incurved towards apices. Female terminalia as in Fig 39; proctiger short broadly rounded, dorso-posterior margin rounded in lateral aspect; subgenital plate short, broadly rounded, triangular from lateral aspect. Nymph (Figs 26 – 28): Measurements and ratios as in Tables 6 – 7. Body brown with dark brown markings. Eyes dark brown; head with submedial dark brown markings posteriorly; thorax with dark brown submedial spots anteriorly, meso-and metathoracic depressions dark brown to black with irregular dark brown markings between them, and posteriorly (together forming an irregular submedial stripe); fore wing pads with a longitudinal dark brown infuscation; caudal plate with dark brown infuscation laterally and delineating margins of abdominal tergites. Body elongate; anterior margin of head angulate (angular anterior to eyes and medially); dorsum of body with a distinct medial longitudinal ridge; caudal plate triangular with hind margin pointed.