Palaiargia arses

Male : Palaiargia arses is a small blue-and-black species known from a juvenile male. The head lacks pale postocular spots and bears a broad pale transverse band across the frons, while the postclypeus is darker. The synthorax is predominantly black with complete blue antehumeral stripes and extensive blue lateral markings. The ventral surface is paler brown. The abdomen is long and slender, mostly black with blue markings on the basal and middle segments, becoming more prominent towards the posterior segments. The anal appendages are black; the superior appendages are stout, slightly flattened, and longer than the inferiors, each bearing a small blunt inner tooth near the base. Because the holotype is immature, the colour pattern of fully mature males remains imperfectly known. Female : The female is strikingly coloured, with a contrasting blue-and-black pattern. The head bears a broad cream to pale orange transverse band across the frons, occasionally tinged with green centrally. The synthorax is predominantly black with conspicuous pale blue to bluish-green markings, including complete antehumeral stripes and broad lateral markings. The abdomen is relatively short and robust, black with well-developed blue markings on the basal and middle segments and more conspicuous blue markings on segments 8–9. The anal appendages are short and conical, while the genital valves are black and only slightly convex.